The efficient synthesis of (3R,3aS,6aR)-hexahydrofuro[2,3-b]furan-3-ol and its isomers
摘要:
The stereoselective synthesis of all the possible stereoisomers of bis-tetrahydrofyran alcohol, a ligand used for obtaining HIV protease inhibitors including Darunavir 1 and Brecanavir 2 has been achieved. A key intermediate 4-pentenal 5 was obtained by employing a Wittig olefination-Claisen rearrangement protocol from D-glyceraldehyde derivative 3 as a source of chirality. The 4-pentenal was readily converted in the bis-THF alcohol moiety in three steps. (C) 2010 Elsevier Ltd. All rights reserved.
A stereodivergent approach to carbahexofuranoses: synthesis of carba-α-d-glucofuranose, carba-β-d-altrofuranose, carba-α-d-allofuranose, carba-β-d-idofuranose, carba-α-d-galactofuranose and carba-β-d-talofuranose
作者:Mukund G. Kulkarni、Ajit S. Borhade、Yunnus B. Shaikh、Attrimuni P. Dhondge、Deekshaputra R. Birhade、Nagorao R. Dhatrak
DOI:10.1016/j.tetlet.2011.08.006
日期:2011.10
A stereodivergent route, starting from d-glyceraldehyde derivative, employing Wittig olefination–Claisen rearrangement protocol is reported for the synthesis of six novel carbahexofuranoses—carba-α-d-glucofuranose, carba-β-d-altrofuranose, carba-α-d-allofuranose, carba-β-d-idofuranose, carba-α-d-galactofuranose and carba-β-d-talofuranose in enantiomerically pure form.