Search Results - "Ha, Hyun‐Joon"

Stereoselective Synthesis of Contiguous Cyclopropylaziridines: Enabling the Construction of Versatile Chiral Molecules Including γ‐Lactams via Ring‐Opening Reactions by Han, Jiho, Ha, Hyun‐Joon, Yang, Jung Woon

“…The synthesis of chiral contiguous cyclopropylaziridine was achieved through cyclopropanation of (E)‐3‐((S)‐1‐[(R)‐1‐phenylethyl)aziridin‐2‐yl]acrylaldehyde…”
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Synthetic Applications of Aziridinium Ions by Ranjith, Jala, Ha, Hyun-Joon

“…Nonactivated aziridine with an electron-donating group at the ring nitrogen should be activated to an aziridinium ion prior to being converted to cyclic and…”
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Preface to "Aziridine Chemistry" by Ha, Hyun-Joon

“…Aziridine is a nitrogen-containing three-membered ring with similar ring strain energy as other three-membered ring compounds, including cyclopropane and…”
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Regioselectivity in the ring opening of non-activated aziridines by Stanković, Sonja, D'hooghe, Matthias, Catak, Saron, Eum, Heesung, Waroquier, Michel, Van Speybroeck, Veronique, De Kimpe, Norbert, Ha, Hyun-Joon

“…In this critical review, the ring opening of non-activated 2-substituted aziridines via intermediate aziridinium salts will be dealt with. Emphasis will be put…”
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Recent advances in synthesizing and utilizing nitrogen-containing heterocycles by Ha, Hyun-Joon

“…The use of organocatalysts and a pot economy has strengthened recent organic syntheses. Synthetic methodologies may be applicable in laboratory preparation or…”
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Synthesis of diverse aryl‐substituted amino propanes by Yoo, Seyeon, Yi, Sojeong, Ha, Hyun‐Joon

“…Amines bearing diverse aryl substituents for potential utilities as energy and new materials have been synthesized from aziridine‐2‐carboxaldehyde and diverse…”
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Highly Efficient and Stereoselective Mukaiyama Aldol Reaction with Chiral Aziridine‐2‐carboxaldehyde and Its Synthetic Applications by Srivastava, Nikhil, Ha, Hyun‐Joon

“…A straightforward and highly diastereoselective synthesis of β‐(aziridin‐2‐yl)‐β‐hydroxy ketones was achieved by the Mukaiyama aldol reaction of optically pure…”
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The founding of Asian Journal of Organic Chemistry by Ha, Hyun‐Joon

“…3‐2‐1 Born to serve the Asian Organic Chemistry Community: In continuation of AsianJOC′s 10th anniversary celebrations this Editorial offers the unique…”
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Bicyclic Aziridinium Ions in Azaheterocyclic Chemistry - Preparation and Synthetic Application of 1-Azoniabicyclo[n.1.0]alkanes by Dolfen, Jeroen, Yadav, Nagendra Nath, De Kimpe, Norbert, D'hooghe, Matthias, Ha, Hyun-Joon

“…Recent advances in the field of ring‐expansion chemistry, involving 1‐azoniabicyclo[n.1.0]alkane scaffolds (bicyclic aziridinium ions) as key transient…”
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α‐Aziridinyl Carbenium Ion Intermediate and Stereoselective Dehydroxylative Diarylation of Aziridin‐2‐yl Carboxaldehyde by Ranjith, Jala, Jeong, Yeolib, Kim, Hyunwoo, Ha, Hyun‐Joon

“…α‐Aziridinyl carbenium ion as an intermediate was observed for the first time from the reaction of aziridin‐2‐yl arylmethanol with Lewis acid BF3 ⋅ OEt2. This…”
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Preparation and Utilization of Contiguous Bisaziridines as Chiral Building Blocks by Rhee, Hyong‐Jin, Ranjith, Jala, Byeon, Huimyoung, Ha, Hyun‐Joon, Yang, Jung Woon

“…Chiral contiguous bisaziridines were prepared by the aziridination of chiral 3‐[1‐(1‐phenylethyl)aziridin‐2‐yl)]acrylaldehydes with either N‐Boc‐O‐tosyl or…”
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Alkylative Aziridine Ring-Opening Reactions by Choi, Jieun, Yu, Taehwan, Ha, Hyun-Joon

“…In this study, the highly strained three-membered aziridine ring was successfully activated as the aziridinium ion by alkylation of the ring nitrogen with a…”
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Atom Economical Multi-Substituted Pyrrole Synthesis from Aziridine by Macha, Lingamurthy, Jala, Ranjith, Na, Sang-Yun, Ha, Hyun-Joon

“…Multi-substituted pyrroles are synthesized from regiospecific aziridine ring-opening and subsequent intramolecular cyclization with a carbonyl group at the…”
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Regioselective ring opening of aziridine for synthesizing azaheterocycle by Srivastava, Nikhil, Ha, Hyun-Joon

“…Aziridine had different regioselective ring openings depending on the functional group of its alkyl substituent. In the case of the alkyl group bearing…”
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One-pot multiple reactions: asymmetric synthesis of 2,6-cis-disubstituted piperidine alkaloids from chiral aziridine by Yadav, Nagendra Nath, Choi, Jihye, Ha, Hyun-Joon

“…A divergent, new, and highly stereoselective synthesis of cis-2,6-disubstituted piperidine natural products including isosolenopsins, deoxocassine, and…”
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Preparation of Chiral Contiguous Epoxyaziridines and Their Regioselective Ring‐Opening for Drug Syntheses by Mao, Hui, Jeong, Hyeonsu, Yang, Jieun, Ha, Hyun‐Joon, Yang, Jung Woon

“…Synthetically valuable chiral (aziridin‐2‐yl)oxirane‐3‐carbaldehydes bearing three consecutive functional groups including aziridine, epoxide, and aldehyde…”
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Preparation of a Stable Bicyclic Aziridinium Ion and Its Ring Expansion toward Piperidines and Azepanes by Choi, Jieun, Yadav, Nagendra Nath, Ha, Hyun‐Joon

“…The formation of the stable form of 1‐azabicyclo[4.1.0]heptane tosylate was successfully achieved from 2‐[4‐tolenesulfonyloxybutyl]aziridine, by stirring in…”
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Researchers in Korea by Ha, Hyun‐Joon

“…A view of Korea! Editorial Board Member and the current (2019) President of the Korean Chemical Society Hyun‐Joon Ha gives his opinions on the recent…”
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Editorial: Recent advances in synthesizing and utilizing nitrogen-containing heterocycles by Ohshima, Takashi, Wu, Hsyueh-Liang, Ha, Hyun-Joon

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Editorial: Strained Aza-Heterocycles in Synthesis by Ha, Hyun-Joon

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