The electrochemical oxidation of cyclic unsaturated esters (1) was carried out using Et3N-5HF as the electrolyte. The ringexpansion and fluorination took place to give β,β-difluorocycloalkanecarboxylic esters (2) selectively.
Diastereospecific synthesis of spiro[4.5]decan-2-ones as vetivane precursor via rhodium catalysed Claisen rearrangement / hydroacylation
作者:Tim Sattelkau、Peter Eilbracht
DOI:10.1016/s0040-4039(98)00197-x
日期:1998.4
The one-pot combination of Claisenrearrangement of allylvinylethers followed by an intramolecular hydroacylation catalysed by RhCl(cod)(dppe) is used as a key step in the synthesis of meso-dimethyl-1,4-dioxa-dispiro[4.2.4.2]tetradecan-10-one (12). The diastereospecific outcome of the reaction is discussed. This product is a potential precursor in the synthesis of solavetivone.