Av. Bedekar et al., SYNTHESIS OF 1,1-DIACETYL-2-(2,2-DICHLOROVINYL)CYCLOPROPANE VIA PHASE-TRANSFER-CATALYZED INTRAMOLECULAR ALKYLATION, Journal of chemical research. Synopses, (5), 1993, pp. 196-197
Starting from 3-(prop-2-enyl)pentane-2,4-dione, a simple synthesis of
1,1-diacetyl-2-(2,2-dichlorovinyl)cyclopropane, involving a phase-tran
sfer-catalysed intramolecular alkylation, is described; based on kinet
ic measurements, tetra-n-butylammonium iodide was found to be the most
suitable catalyst.