Stereoselective synthesis of (−)- and (+)-pentenomycins using RCM
摘要:
An efficient synthesis of enantiopure (-)- and (+)-pentenomycins are described by reductive iodo elimination and ring-closing metathesis (RCM), as the key steps. The first synthesis of the unnatural (+)-isomer is described. (C) 2003 Elsevier Science Ltd. All rights reserved.
An efficient approach for the synthesis of (+) pentenomycin and (-) pentenomycin from D-ribose and D-mannose, respectively, is described using Tebbe olefination of lactones 9 and 7 followed by Me2AlCl induced disfavoured 5-(enol-endo)-exo-trig cyclization. (C) 2013 Elsevier Ltd. All rights reserved.
Total synthesis of (±)-pentenomycin
作者:Faiz Ahmed Khan、Bhimsen Rout
DOI:10.1016/j.tetlet.2006.05.156
日期:2006.7
A concise stereoselective route to (+/-)-pentenomycin I in 33% overall yield starting from the readily accessible Diels-Alder adduct 4 is reported. The key reaction involves decarbonylation of beta-methoxy-alpha,beta-unsaturated aldehyde 8 obtained from beta-hydroxy-dimethylketal 6. (c) 2006 Elsevier Ltd. All rights reserved.