Addition of a Functionalized Isoprene Unit to an Allyl Alcohol. III. The reaction with optically activecis-carveol
作者:Alan F. Thomas、G. Ohloff
DOI:10.1002/hlca.19700530530
日期:——
Provided the temperature is kept under 150°, diene ethers of allylalcohols rearrange in the double Claisen-Cope reaction largely by a sigmatropic process in both stages. This was demonstrated by using the 2-methylbutadienyl ether of (−)-cis-carveol, when the product obtained after the two rearrangements was optically active. To check the extent of chirality loss, the same product was synthesized by