Gold(I)-Catalyzed Rearrangement of 3-Silyloxy-1,5-enynes: An Efficient Synthesis of Benzo[b]thiophenes, Dibenzothiophenes, Dibenzofurans, and Indole Derivatives
作者:A. Stephen K. Hashmi、Weibo Yang、Frank Rominger
DOI:10.1002/chem.201200314
日期:2012.5.21
With the IPr ligand (IPr=1,3‐bis‐(2,6‐diisopropylphenyl)imidazol‐2‐ylidene) on gold(I) excellent yields in the benzanellation of 2‐substituted thiophenes, benzothiophenes, pyrroles, benzofurans, and indoles were achieved. The 1‐siloxybut‐3‐ynyl side chains, incorporated in the anellation, are easily accessible by the addition of a propargyl metal reagent to a formyl group and silylation of the alcohol
Stereoselective synthesis of C-fused pyranoindoles, pyranobenzofurans and pyranobenzothiophene scaffolds using oxa-Pictet–Spengler type reaction of vinylogous carbonates
作者:Santosh J. Gharpure、V. Prasath
DOI:10.1039/c4ob01387e
日期:——
C-fused pyranoheterocycles can be assembled in a highly diastereoselective manner using an intramolecular oxa-Pictet–Spengler type reaction of vinylogous carbonates.
Chemoenzymatic synthesis of novel 1,4-disubstituted 1,2,3-triazole derivatives from 2-heteroaryl substituted homopropargyl alcohols
作者:Nalan Nuriye Büyükadalı、Semih Seven、Nezir Aslan、Duygu Yenidede、Ayşegül Gümüş
DOI:10.1016/j.tetasy.2015.10.001
日期:2015.12
The one-potsynthesis of novel 1,4-disubstituted 1,2,3-triazoles from homopropargyl alcohol backbones is described. The key intermediates 2-benzothiophenyl 1a and 2-benzofuranyl 1b substituted homopropargyl alcohols were synthesized starting from their corresponding carboxyaldehyde derivatives. The racemic heteroaryl-substituted homopropargyl alcohol derivatives are successfully resolved to give the