Asymmetric synthesis of (3S) 3-benzoyloxymethylisobenzofuranone and its 3R enantiomer as analogues of α,β-butenolides
摘要:
Both enantiomers of 3-benzoyloxymethylisobenzofuranone have been obtained in good yield in six steps from phthalaldehyde using a D-xylose derivative as a chiral protecting group. The two chiral heterocycles are gamma-hydroxymethyl-alpha,beta-butenolide analogues having a benzene ring in positions 2 and 3. The key step was the dihydroxylation using both OsO4 and AD-mix developed by Sharpless. The asymmetric dihydroxylation using AD-mix required a double diastereoselectivity and gave excellent diastereoisomeric excess. (C) 2003 Elsevier Science Ltd. All rights reserved.
Enantiomerical excess determination, purification and biological evaluation of (3S) and (3R) α,β-butenolide analogues of isobenzofuranone
作者:Emmanuelle Lipka、Marie-Pierre Vaccher、Claude Vaccher、Christophe Len
DOI:10.1016/j.bmcl.2004.11.065
日期:2005.2
The asymmetricsynthesis of isobenzofurane analogues, new potential antiviralagents, is reported. High performance liquid chromatography (HPLC) was the technique chosen to separate the enantiomers. We describe this chiral separation and then determine the enantiomerical excess. The biological results of each tested enantiomer are given.