Chemistry of insect antifeedants from Azadirachta indica(part 13): on the use of the intramolecular Diels–Alder reaction for the construction of trans-fused hydrobenzofuran fragments for azadirachtin synthesis
作者:Hartmuth C. Kolb、Steven V. Ley、Richard N. Sheppard、Alexandra M. Z. Slawin、Stephen C. Smith、David J. Williams、Anthony Wood
DOI:10.1039/p19920002763
日期:——
This paper describes a detailed analysis of the influence of various substituents on the stereochemical outcome of the intramolecular Diels–Alder cyclisation of a number of ether-linked trienes. In particular, the role of diene planarity in governing reaction synchronicity and related twist asynchronicity is delineated. Additionally, the controlling influence of a large dimethyl(phenyl)silyl substituent