Tris(2,4,6-trimethoxyphenyl)phosphine (TTMPP): Efficient Catalysts for the Cyanosilylation and Cyanocarbonation of Aldehydes and Ketones
作者:Satoru Matsukawa、Izumi Sekine、Ayumi Iitsuka
DOI:10.3390/molecules14093353
日期:——
A variety of aldehydes and ketones were transformed to their corresponding cyanohydrin silyl ethers in good to excellent yields in the presence of 1-5 mol% of tris(2,4,6-trimethoxyphenyl)phosphine (TTMPP). Cyanohydrin carbonates were also readily prepared using 5-10 mol% of TTMPP as an organocatalyst.
A variety of cyanohydrin carbonates were readily prepared from aldehydes with cyanoformate in DMSO using no catalyst in a convenient one-pot procedure.
O-Methoxycarbonyl Cyanohydrin as a New Protective Group for Carbonyls
作者:David Berthiaume、Donald Poirier
DOI:10.1016/s0040-4020(00)00535-4
日期:2000.8
O-Methoxycarbonyl cyanohydrin, a newprotectivegroup of carbonyls, was prepared in high yields by an efficient one-step procedure using methyl cyanoformate and a secondary alkylamine at room temperature. Herein, we report efficient methods for the formation and cleavage of the protectivegroup. Also, the ability of different types of carbonyls to be protected and the protectivegroup's behavior under different
for the synthesis of 0-substituted cyanohydrins from aldehydes and ketones, in the absence of solvent, employing minimum amounts of the corresponding cyanides has been optimised. Aldehydes react more rapidly than ketones using triethylamine as catalyst offering in both cases almost quantitative yields of the corresponding O-trimethylsilyl, O-methoxycarbonyl, O-benzoyl and O-acetyl cyanohydrins.