Systematic variation of all substructures embedded into the framework of iejimalide B (2) led to a panel of synthetic analogues of this polyunsaturated macrolide, featuring structural modifications that are not accessible by derivatization of the natural lead compound itself. The assessment of the cytotoxicity of these compounds with the aid of a monolayer proliferation assay (12 human tumor cell lines
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