Intramolecular Dehydration of Dialkylacetic Acids and Trimethylsilylacetic Acid with Dicyclohexylcarbodiimide to the Corresponding Stable Ketenes
作者:George A. Olah、An-hsiang Wu、Omar Farooq
DOI:10.1055/s-1989-27324
日期:——
A new, simple preparation for stable dialkyl ketenes involving intramolecular dehydration of appropriately substituted acetic acids with dicyclohexylcarbodiimide (DCC) in the presence of catalytic amounts of triethylamine gives 60-70% yield of the corresponding ketenes. Trimethylsilylacetic acid also gives trimethylsilylketene in good yield.
OLAH, GEORGE A.;WU, AN-HSIANG;FAROOQ, OMAR, SYNTHESIS,(1989) N, C. 569-570
作者:OLAH, GEORGE A.、WU, AN-HSIANG、FAROOQ, OMAR
DOI:——
日期:——
OLAH, GEORGE A.;WU, AN-HSIANG;FAROOQ, OMAR, SYNTHESIS,(1989) N, C. 566-567
作者:OLAH, GEORGE A.、WU, AN-HSIANG、FAROOQ, OMAR
DOI:——
日期:——
Ultrasound-Assisted Preparation of Di-<i>tert</i>-Butyl-,Di-1,1′ Adamantyl- and (1-Adamantyl)-<i>tert</i>-Butylketenes
作者:George A. Olah、An-hsiang Wu、Omar Farooq
DOI:10.1055/s-1989-27323
日期:——
Di-tert-butyl-, di(1-adamantyl)- and (1-adamantyl)-tert-butylketenes were prepared in excellent yield from their corresponding acetyl chlorides with triethylamine under ultrasonic irradiation, showing a dramatic improvement over attempted conventional dehydrochlorination.