Investigation of the Cyclopentenone Formationvia the ?-Alkynone Cyclisation: Synthesis of the Acorone Intermediate 8-Methylspiro[4.5]deca-3,7-dien-2-one
作者:John Ackroyd、Martin Karpf、Andr� S. Dreiding
DOI:10.1002/hlca.19850680208
日期:1985.3.27
of the cyclopentenone formation ACvia the thermal α-alkynone cyclisation BC and in order to test the fate of an isolated C,C-double bond within a molecule under these conditions, we investigated the synthesis of the acorone intermediate 3starting from the known carboxylic acid 1. The α-alkynone 2 was obtained from 1via the acyl chloride 6 and a Pd(II)-catalysed route (22%). The thermolysis of 2 at