作者:A. A. Avetisyan、G. G. Tokmadzhyan、R. A. Piridzhanyan
DOI:10.1134/s1070428008070221
日期:2008.7
Reactions of alpha-ketols with diethyl malonate at the molar ratio 2:1 in the presence of K(2)CO(3) were investigated. The heterospiranes obtained contained a dihydrofuran and a gamma-lactone rings. The optimum conditions for the synthesis of heterospiranes were found by varying the ratio of the initial compounds: alpha-ketoalcohol (or 2-ethoxycarbonyl-, 2-methoxycarbonyl-, 2-cyano-3,4,4-trimethyl-2-buten-4-olides), diethyl malonate, K(2)CO(3), by varying the environment, and also the temperature and the time of the reaction.