Collection of Czechoslovak chemical communications

Preparation of 2, 2-dimethyl-5-R-1, 3-dioxane-4, 6-dione derivatives

J Prousek

文献索引：Prousek, Josef Collection of Czechoslovak Chemical Communications, 1991 , vol. 56, # 6 p. 1361 - 1363

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被引用次数: 8

摘要

Melting points were measured on a Kofler block and are uncorrected. IR spectra (cm 1) were measured by the KBr technique (Table II). Meldrum's acid (I) was prepared according to ref.' in 63% yield; mp 94—95°C (acetone) (reported' mp 94—95°C), reffux in chloroform solution being the method of choice. In most cases the products separated already during the reaction. ... 2,2-Dimethyl-5-R-1,3-dioxane-4,6-diones (ha— JIg) Acetic acid (02 ml) and piperidine ...