A New Tactic for Tocopherol Synthesis Using Intramolecular Benzyne Trapping by an Alcohol
摘要:
A formal total synthesis of (S)-alpha-tocopherol, the major component of natural Vitamin E has been achieved using intramolecular benzyne trapping as a key step to form the chroman ring. The synthesis also features an efficient new method for benzotriazole N-amination using an oxaziridine; chiral, nonracemic intermediates are generated using asymmetric dihydroxylation.This paper is dedicated to Professor Lutz Tietze on his 75th birthday, with all best wishes.
A synthesis of α-tocopherol featuring benzyne trapping by an alcohol
作者:David W. Knight、Xu Qing
DOI:10.1016/j.tetlet.2009.03.022
日期:2009.7
A formal total synthesis of alpha-tocopherol, the main component of Vitamin E, has been achieved in which a central step is the intramolecular trapping of a highly substituted benzyne by an alcohol group to establish the pyran ring. (C) 2009 Elsevier Ltd. All right reserved.