Efficient 1,3 ester shift in α-disubstituted β-ketoester enolates. Remarkable influence of the metal counterion on the rate of reaction
摘要:
The efficient and rapid alpha to gamma rearrangement of the carbalkoxy group in alpha-disubstituted beta-ketoesters is reported. The reaction proceeds at room temperature and in high yields when performed under naked anion conditions. A crossover experiment using appropriately substituted beta-ketoesters is consistent with a cyclobutanedione monohemiketal intermediate.
New cyclization procedure for alkenyl-substituted β-dicarbonyl compounds using N-phenylselenophthalimide
作者:William P. Jackson、Steven V. Ley、Judith A. Morton
DOI:10.1039/c39800001028
日期:——
N-Phenylselenophthalimide can be used as an effective cyclizing reagent for certain alkenyl-substitutedβ-dicarbonylcompounds to give a number of polyfunctionalised products.
Cyclisation reactions of alkenyl β-ketoesters involving a novel phenylseleno group migration
作者:William P. Jackson、Steven V. Ley、Judith A. Morton
DOI:10.1016/s0040-4039(01)90531-3
日期:1981.1
A number of alkenyl-substituted α-phenylseleno β-ketoesters can be cyclised in the presence of acidic catalysts in which a novel migration of phenylseleno moiety occurs.