All Stories

  1. Synthetic Applications of Aziridinium Ions

    Article • Molecules, March 2021, MDPI AG

    Hyun-Joon Ha

  2. Alkylative Aziridine Ring-Opening Reactions

    Article • Molecules, March 2021, MDPI AG

    Hyun-Joon Ha

  3. Preface to “Aziridine Chemistry”

    Article • Molecules, March 2021, MDPI AG

    Hyun-Joon Ha

  4. Building Diverse Medicinal Compounds from Aziridines

    Article • January 2021, Science Diffusion Ltd

    Hyun-Joon Ha

  5. Editorial: Strained Aza-Heterocycles in Synthesis

    Article • Frontiers in Chemistry, October 2019, Frontiers

    Hyun-Joon Ha

  6. Researchers in Korea

    Article • Asian Journal of Organic Chemistry, September 2019, Wiley

    Hyun-Joon Ha

  7. Synthesis of 4- to 7-membered Heterocycles by Ring Expansion

    Article • January 2016, Springer Science + Business Media

    Hyun-Joon Ha

  8. ChemInform Abstract: New Perspective on the Synthesis of Aziridine

    Article • ChemInform, August 2015, Wiley

    Hyun-Joon Ha

  9. Atom economical synthesis of oxindoles by metal-catalyzed intramolecular C–C bond formation under solvent-free and aerobic conditions

    Article • Green Chemistry, January 2015, Royal Society of Chemistry

    Hyun-Joon Ha

  10. Stereoselective Pd-catalyzed etherification and asymmetric synthesis of furanomycin and its analogues from a chiral aziridine

    Article • Organic & Biomolecular Chemistry, January 2015, Royal Society of Chemistry

    Hyun-Joon Ha

  11. Ratiometric fluorescence probes based on a Michael acceptor type of coumarin and their application for the multichannel imaging of in vivo glutathione

    Article • RSC Advances, January 2014, Royal Society of Chemistry

    Hyun-Joon Ha

  12. Caged rhodamine-based fluorescent probe for biothiol: Selective detection of cysteine over homocysteine and glutathione in water

    Article • Sensors and Actuators B Chemical, November 2013, Elsevier

    Hyun-Joon Ha

  13. ChemInform Abstract: Highly Stereoselective Directed Reactions and an Efficient Synthesis of Azafuranoses from a Chiral Aziridine.

    Article • ChemInform, September 2013, Wiley

    Hyun-Joon Ha

  14. ChemInform Abstract: CAL‐B Catalyzed Desymmetrization of 3‐Alkylglutarate: “Olefin Effect” and Asymmetric Synthesis of Pregabalin.

    Article • ChemInform, August 2013, Wiley

    Hyun-Joon Ha

  15. CAL-B catalyzed desymmetrization of 3-alkylglutarate: “olefin effect” and asymmetric synthesis of pregabalin

    Article • Organic & Biomolecular Chemistry, January 2013, Royal Society of Chemistry

    Hyun-Joon Ha

  16. ChemInform Abstract: Synthesis of 2,5‐Disubstituted 6‐Azaindoles from Substituted Aziridines via Intramolecular Cyclization.

    Article • ChemInform, September 2012, Wiley

    Hyun-Joon Ha

  17. Synthesis of 2,5-Disubstituted 6-Azaindoles from Substituted Aziridines via Intramolecular Cyclization

    Article • Organic Letters, June 2012, American Chemical Society (ACS)

    Hyun-Joon Ha

  18. ChemInform Abstract: Chiral Aziridine‐2‐carboxylates: Versatile Precursors for Functionalized Tetrahydroisoquinoline (THIQ) Containing Heterocycles.

    Article • ChemInform, May 2012, Wiley

    Hyun-Joon Ha

  19. ChemInform Abstract: Regioselectivity in the Ring Opening of Non‐Activated Aziridines

    Article • ChemInform, April 2012, Wiley

    Hyun-Joon Ha

  20. Regioselectivity in the ring opening of non-activated aziridines

    Article • Chemical Society Reviews, January 2012, Royal Society of Chemistry

    Hyun-Joon Ha

  21. Chiral aziridine-2-carboxylates: versatile precursors for functionalized tetrahydroisoquinoline (THIQ) containing heterocycles

    Article • Tetrahedron, January 2012, Elsevier

    Hyun-Joon Ha

  22. Alkylative Ring Opening of N-Methylaziridinium Ions and a Formal Synthesis of Tyroscherin

    Article • Organic Letters, December 2011, American Chemical Society (ACS)

    Hyun-Joon Ha

  23. N-Methylative aziridine ring opening and asymmetric synthesis of MeBmt

    Article • Tetrahedron Letters, November 2011, Elsevier

    Hyun-Joon Ha

  24. 3,4-Disubstituted oxazolidin-2-ones as constrained ceramide analogs with anticancer activities

    Article • Bioorganic & Medicinal Chemistry, November 2011, Elsevier

    Hyun-Joon Ha

  25. Fluorescence turn-on probe for biothiols: intramolecular hydrogen bonding effect on the Michael reaction

    Article • Tetrahedron, October 2011, Elsevier

    Hyun-Joon Ha

  26. ChemInform Abstract: Synthesis of 1,2,5‐ and 1,2,3,5‐Substituted Pyrroles from Substituted Aziridines via Ag(I)‐Catalyzed Intramolecular Cyclization.

    Article • ChemInform, August 2011, Wiley

    Hyun-Joon Ha

  27. Synthesis of 1,2,5- and 1,2,3,5-substituted pyrroles from substituted aziridines via Ag(I)-catalyzed intramolecular cyclization

    Article • Tetrahedron, May 2011, Elsevier

    Hyun-Joon Ha

  28. ChemInform Abstract: An Efficient Synthesis of Enantiomerically Pure Aromatic‐Fused N‐Containing Heterocycles from Common Chiral Aziridines.

    Article • ChemInform, January 2011, Wiley

    Hyun-Joon Ha

  29. Asymmetric synthesis of 1-deoxyazasugars from chiral aziridines

    Article • Organic & Biomolecular Chemistry, January 2011, Royal Society of Chemistry

    Hyun-Joon Ha

  30. An efficient synthesis of enantiomerically pure aromatic-fused N-containing heterocycles from common chiral aziridines

    Article • Tetrahedron, October 2010, Elsevier

    Hyun-Joon Ha

  31. Radiosynthesis and in vitro evaluation of 1‐(tetrahydro‐5‐hydroxy‐6‐(hydroxymethyl)‐2H‐pyran‐3‐yl)‐5‐[125I]iodouracil: A new potential agent for HSV1‐tk reporter gene monitoring

    Article • Journal of Labelled Compounds and Radiopharmaceuticals, September 2010, Wiley

    Hyun-Joon Ha

  32. ChemInform Abstract: Conjugate Addition of Amines to Chiral 3‐Aziridin‐2‐yl‐acrylates.

    Article • ChemInform, July 2010, Wiley

    Hyun-Joon Ha

  33. A formal synthesis of (−)-swainsonine from a chiral aziridine

    Article • Tetrahedron Letters, June 2010, Elsevier

    Hyun-Joon Ha

  34. ChemInform Abstract: Selective Reduction of C—C Double Bonds of 2‐Vinylaziridines: Preparation of Enantiomerically Pure 2‐Alkylaziridines.

    Article • ChemInform, April 2010, Wiley

    Hyun-Joon Ha

  35. Conjugate addition of amines to chiral 3-aziridin-2-yl-acrylates

    Article • Tetrahedron Letters, April 2010, Elsevier

    Hyun-Joon Ha

  36. Molecular Basis for the Stereoselective Ammoniolysis of N‐Alkyl Aziridine‐2‐Carboxylates Catalyzed by Candida antarctica Lipase B

    Article • ChemBioChem, August 2009, Wiley

    Hyun-Joon Ha

  37. ChemInform Abstract: Synthesis of D‐erythro‐Sphingosine from D‐ribo‐Phytosphingosine.

    Article • ChemInform, July 2009, Wiley

    Hyun-Joon Ha

  38. A simple Cu-64 production and its application of Cu-64 ATSM

    Article • Applied Radiation and Isotopes, July 2009, Elsevier

    Hyun-Joon Ha

  39. ChemInform Abstract: The Preparation of Stable Aziridinium Ions and Their Ring Openings.

    Article • ChemInform, January 2009, Wiley

    Hyun-Joon Ha

  40. Nucleophilic substitution of (sulfonyloxymethyl)aziridines: an asymmetric synthesis of both isomers of mexiletine

    Article • Tetrahedron, December 2008, Elsevier

    Hyun-Joon Ha

  41. ChemInform Abstract: Asymmetric Formal Synthesis of (‐)‐Formoterol and (‐)‐Tamsulosin.

    Article • ChemInform, January 2008, Wiley

    Hyun-Joon Ha

  42. The preparation of stable aziridinium ions and their ring-openings

    Article • Chemical Communications, January 2008, Royal Society of Chemistry

    Hyun-Joon Ha

  43. Selective Mono‐BOC Protection of Diamines.

    Article • ChemInform, July 2007, Wiley

    Hyun-Joon Ha

  44. Dihydroxylation of 2‐Vinylaziridine: Efficient Synthesis of D‐ribo‐Phytosphingosine.

    Article • ChemInform, April 2007, Wiley

    Hyun-Joon Ha

  45. Preparation of Enantiopure 2‐Acylazetidine and Their Reactions with Chloroformates.

    Article • ChemInform, April 2007, Wiley

    Hyun-Joon Ha

  46. Selective Mono‐BOC Protection of Diamines

    Article • Synthetic Communications, March 2007, Taylor & Francis

    Hyun-Joon Ha

  47. Preparation of enantiopure 2-acylazetidines and their reactions with chloroformates

    Article • Tetrahedron Letters, January 2007, Elsevier

    Hyun-Joon Ha

  48. Asymmetric Formal Synthesis of (-)-Formoterol and (-)-Tamsulosin

    Article • Heterocycles, January 2007, Japan Institute of Heterocyclic Chemistry

    Hyun-Joon Ha

  49. Dihydroxylation of 2-vinylaziridine: efficient synthesis ofd-ribo-phytosphingosine

    Article • Chemical Communications, January 2007, Royal Society of Chemistry

    Hyun-Joon Ha

  50. Ring Opening of 2‐Acylaziridines by Acid Chlorides.

    Article • ChemInform, December 2006, Wiley

    Hyun-Joon Ha

  51. Ring opening of 2-acylaziridines by acid chlorides

    Article • Tetrahedron, September 2006, Elsevier

    Hyun-Joon Ha

  52. Synthesis of Constrained Ceramide Analogues and Their Potent Antileukemic Activities.

    Article • ChemInform, July 2006, Wiley

    Hyun-Joon Ha

  53. Synthesis of Functionalized Bicyclic Triazoles from Chiral Aziridines.

    Article • ChemInform, December 2005, Wiley

    Hyun-Joon Ha

  54. Addition Reactions to Chiral Aziridine‐2‐carboxaldimine Toward Various Enantiopure Nitrogen‐Containing Heterocycles.

    Article • ChemInform, December 2005, Wiley

    Hyun-Joon Ha

  55. Lewis Acid‐Catalyzed Stereospecific Ring Expansion of Aziridine‐2‐carboxylates to Imidazolidin‐2‐ones.

    Article • ChemInform, September 2005, Wiley

    Hyun-Joon Ha

  56. Preparation of 2,3‐Diaminopropionate from Ring Opening of Aziridine‐2‐carboxylate.

    Article • ChemInform, September 2005, Wiley

    Hyun-Joon Ha

  57. Addition reactions to chiral aziridine-2-carboxaldimine toward various enantiopure nitrogen-containing heterocycles

    Article • Tetrahedron, September 2005, Elsevier

    Hyun-Joon Ha

  58. Stereoselective Addition of Nucleophiles to Aziridinyl‐2‐carboxaldimine.

    Article • ChemInform, March 2005, Wiley

    Hyun-Joon Ha

  59. Synthesis of Functionalized Bicyclic Triazoles from Chiral Aziridines

    Article • Synlett, January 2005, Thieme Publishing Group

    Hyun-Joon Ha

  60. Lewis acid-catalyzed stereospecific ring expansion of aziridine-2-carboxylates to imidazolidin-2-ones

    Article • Chemical Communications, January 2005, Royal Society of Chemistry

    Hyun-Joon Ha

  61. Synthesis and antibacterial activity of arylpiperazinyl oxazolidinones with diversification of the N-substituents

    Article • Bioorganic & Medicinal Chemistry Letters, August 2004, Elsevier

    Hyun-Joon Ha

  62. Highlights of the Chemistry of Enantiomerically Pure Aziridine‐2‐carboxylates

    Article • ChemInform, June 2004, Wiley

    Hyun-Joon Ha

  63. Novel Synthesis of 4′C‐Aryl‐Branched Acyclic Nucleoside Using [3,3]‐Sigmatropic Rearrangement.

    Article • ChemInform, January 2004, Wiley

    Hyun-Joon Ha

  64. Novel Stereoselective Synthesis of Functionalized Oxazolidinones from Chiral Aziridines.

    Article • ChemInform, May 2003, Wiley

    Hyun-Joon Ha

  65. Stereoselective Reduction of 2-Acylaziridines: An Efficient Synthesis of D-erythro- Sphinganine and Safingol From a Common Intermediate

    Article • January 2003, Elsevier

    Hyun-Joon Ha

  66. Synthetic Applications of Lewis Acid Induced N‐Methyleneamine Equivalents

    Article • ChemInform, October 2002, Wiley

    Hyun-Joon Ha

  67. ChemInform Abstract: Synthesis of Substituted‐(l)‐Tryptophanols from an Enantiomerically Pure Aziridine‐2‐methanol.

    Article • ChemInform, May 2002, Wiley

    Hyun-Joon Ha

  68. Synthetic Applications of Lewis Acid-induced N-Methyleneamine Equivalents

    Article • Heterocycles, January 2002, Japan Institute of Heterocyclic Chemistry

    Hyun-Joon Ha

  69. FACILE SYNTHESIS OF β-ANILINOPROPIONATES FROM LEWIS ACID-INDUCEDN-METHYLENEANILINES WITH KETENE ACETALS*

    Article • Synthetic Communications, January 2002, Taylor & Francis

    Hyun-Joon Ha

  70. An Efficient Synthesis of N-Boc-D-diphenylalanine from a Chiral Azirdine-2-carboxylate

    Article • Heterocycles, January 2002, Japan Institute of Heterocyclic Chemistry

    Hyun-Joon Ha

  71. Lipase-catalyzed enantioselective hydrolysis of β-acetyloxymethyl-β-valerolactone

    Article • ARKIVOC, August 2001, ARKAT USA, Inc.

    Hyun-Joon Ha

  72. Serotonin Receptor and Transporter Ligands - Current Status

    Article • Current Medicinal Chemistry, July 2001, Bentham Science Publishers

    Hyun-Joon Ha

  73. ChemInform Abstract: Stereoselective Synthesis of Protected threo‐β‐Hydroxy‐L‐glutamic Acid Using a Chiral Aziridine.

    Article • ChemInform, January 2001, Wiley

    Hyun-Joon Ha

  74. ChemInform Abstract: Stereocontrolled Iodolactonization of Acyclic Olefinic Amides.

    Article • ChemInform, January 2001, Wiley

    Hyun-Joon Ha

  75. Stereocontrolled Iodolactonization of Acyclic Olefinic Amides

    Article • Synthetic Communications, October 2000, Taylor & Francis

    Hyun-Joon Ha

  76. Stereoselective synthesis of protected threo-β-hydroxy-l-glutamic acid using a chiral aziridine

    Article • Tetrahedron Asymmetry, August 2000, Elsevier

    Hyun-Joon Ha

  77. ChemInform Abstract: Formal Synthesis of (‐)‐Serricornin.

    Article • ChemInform, July 2000, Wiley

    Hyun-Joon Ha

  78. Formal Synthesis of (-)-Serricornin

    Article • Synthetic Communications, February 2000, Taylor & Francis

    Hyun-Joon Ha

  79. Asymmetric synthesis of 3-amino-2-hydroxy-4-phenylbutanoate

    Article • Tetrahedron Asymmetry, June 1999, Elsevier

    Hyun-Joon Ha

  80. Practical synthesis of Taxol side chain

    Article • Bioorganic & Medicinal Chemistry Letters, July 1998, Elsevier

    Hyun-Joon Ha

  81. Synthesis of analogues of 5-aminolaevulinic acid and inhibition of 5-aminolaevulinic acid dehydratase 1

    Article • Journal of the Chemical Society Perkin Transactions 1, January 1998, Royal Society of Chemistry

    Hyun-Joon Ha

  82. Facile Method for the Monomethylation of Anilines1

    Article • Synthetic Communications, May 1997, Taylor & Francis

    Hyun-Joon Ha

  83. Silica gel supported bis-cinchona alkaloid: a highly efficient chiral ligand for heterogeneous asymmetric dihydroxylation of olefins

    Article • Tetrahedron Asymmetry, March 1997, Elsevier

    Hyun-Joon Ha

  84. Addition of 2-Trimethylsilyloxyfuran to Catalytically Generated N-Methyleneamine Equivalents: Synthesis of 5-Aminomethyl-2,5-dihydrofuran-2-ones

    Article • Heterocycles, January 1997, Japan Institute of Heterocyclic Chemistry

    Hyun-Joon Ha

  85. Addition of Propargyltrimethylsilane to N-Methyleneamine Equivalents: Generation and Electrophilic Cyclization of Vinylic Carbocations

    Article • Heterocycles, January 1997, Japan Institute of Heterocyclic Chemistry

    Hyun-Joon Ha

  86. Efficient and practical polymeric catalysts for heterogeneous asymmetric dihydroxylation of olefins

    Article • Tetrahedron Asymmetry, March 1996, Elsevier

    Hyun-Joon Ha

  87. TiCl4Induced N-Methyleneamine Equivalents. 21. First Synthesis of Anilinomethylazides

    Article • Synthetic Communications, April 1995, Taylor & Francis

    Hyun-Joon Ha

  88. Selective Bromination of Ketones. A Convenient Synthesis of 5-Aminolevulinic Acid

    Article • Synthetic Communications, October 1994, Taylor & Francis

    Hyun-Joon Ha

  89. Polymeric cinchona alkaloids as catalysts in the enantioselective 2,2-cycloaddition reaction of ketene and chloral

    Article • Tetrahedron Asymmetry, July 1994, Elsevier

    Hyun-Joon Ha

  90. Fungicidal activity of a series of chloroacetylanilidophosphonates

    Article • Pesticide Science, January 1993, Wiley

    Hyun-Joon Ha

  91. An Efficient Synthesis of Anilinobenzylphosphonates

    Article • Synthetic Communications, April 1992, Taylor & Francis

    Hyun-Joon Ha

  92. Stereochemistry in nucleophilic vinylic substitution of activated nitro olefins. 2

    Article • The Journal of Organic Chemistry, November 1991, American Chemical Society (ACS)

    Hyun-Joon Ha

  93. TiCl4induced N-Methyleneamine Equivalents: A New Route to Aminoacetonitriles

    Article • Synthetic Communications, January 1991, Taylor & Francis

    Hyun-Joon Ha

  94. The synthesis of (3R)-nerolidol

    Article • Tetrahedron Letters, January 1990, Elsevier

    Hyun-Joon Ha

  95. Stereochemistry in nucleophilic vinylic substitution of activated nitro olefins.

    Article • Bulletin of the Chemical Society of Japan, January 1990, Chemical Society of Japan

    Hyun-Joon Ha

  96. Purification and inhibition of spinach .alpha.,.beta.-dihydroxyacid dehydratase

    Article • The Journal of Organic Chemistry, March 1989, American Chemical Society (ACS)

    Hyun-Joon Ha

  97. Trichodiene biosynthesis and the role of nerolidyl pyrophosphate in the enzymic cyclization of farnesyl pyrophosphate

    Article • Journal of the American Chemical Society, September 1988, American Chemical Society (ACS)

    Hyun-Joon Ha

  98. Trichodiene biosynthesis and the enzymatic cyclization of nerolidyl pyrophosphate

    Article • Journal of the American Chemical Society, May 1986, American Chemical Society (ACS)

    Hyun-Joon Ha

  99. Trichodiene biosynthesis and the stereochemistry of the enzymatic cyclization of farnesyl pyrophosphate

    Article • Bioorganic Chemistry, September 1985, Elsevier

    Hyun-Joon Ha