Synthesis and Antiproliferative Activities of 1-Hydroxyindole-2-Carboxylates
作者:Yeon Kyeong Park、Yea Seong Ryu、Hyunsung Cho、Ha Sook Chung、Sang Hyup Lee
DOI:10.1002/bkcs.11418
日期:2018.4
Synthesis and evaluation of antiproliferative activities of 1‐hydroxyindole‐2‐carboxylates 1 were described. The toluene compounds 3 were treated with dimethyl oxalate and then, dimethylmethyleneammonium chloride to give intermediates 2. Compounds 2 were converted to desired compounds 1 by application of the reaction of 1‐hydroxyindole formation using SnCl2·2H2O and thiol (or alcohol). The measurements
Synthesis of New Highly Substituted and Hindered 1-Hydroxyindole-2-carboxylates
作者:Yeon Kyeong Park、Hyejin Kim、Sang Hyup Lee
DOI:10.1002/bkcs.10630
日期:2016.1
The synthesis of new, highlysubstituted, and hindered 1‐hydroxyindole‐2‐carboxylates 1 is described. Substrates 2, prepared through a two‐step synthetic sequence, were treated with relatively weak nucleophiles in the presence of SnCl2 · 2H2O to afford compounds 1. In particular, nucleophiles of low reactivity and/or high steric hindrance reacted efficiently to give 1 in good to modest yields.
Synthesis of New 1‐Hydroxyindole‐2‐Carboxylates and Mechanistic Studies on Reaction Pathways
作者:Yeon Kyeong Park、Sang Hyup Lee
DOI:10.1002/jhet.2796
日期:2017.5
Synthesis of new 1‐hydroxyindole‐2‐carboxylates 1 and mechanistic studies on the reactionpathways were described. The substrates 2, prepared through two‐step synthetic sequences, were treated with nucleophiles in the presence of SnCl2 · 2H2O to obtain compounds 1. In particular, the mechanistic studies led to a significant finding that reactions with thiol nucleophiles occur through a newly proposed
Synthesis of New 2,3-Disubstituted 4-Chloro-1-hydroxyindoles
作者:Yeon Kyeong Park、Hyejin Kim、Dong Sun Kim、Hyunsung Cho、Aree Moon、Choonsik Jeong、Hye-Ran Yoon、Sang Hyup Lee
DOI:10.1002/bkcs.10410
日期:2015.8
doles were described. The conjugate nitro ketoester was reacted with various thiol and alcohol nucleophiles by the action of stannous chloride dihydrate through the unique processes of reduction of nitrogroup, intramolecular condensation, and addition of nucleophiles in one pot, to provide multisubstituted 1‐hydroxyindoles. The reactions with thiol nucleophiles provided better results than those with
carbene (NHC)-catalyzed asymmetric construction of centrally chiral molecules, NHC-catalyzed atroposelective synthesis of axially chiral molecules remains largely underdeveloped. Notably, alkynyl acyl azolium intermediates were commonly used in constructing a heteroaryl ring to furnish axially enantioenriched heteroaryl-aryls. The inherent character of the intermediates often led to react with sterically