Reaction of ketene silyl acetals with diazonium salts: a novel α-amino acid ester synthesis
作者:Toshiyasu Sakakura、Masato Tanaka
DOI:10.1039/c39850001309
日期:——
The reaction of ketenesilylacetals with arenediazonium tetrafluoroborate gave α-hydrazono and α-azo esters, which were easily hydrogenated to α-aminoesters.
乙烯酮甲硅烷基缩醛与四氟硼酸壬二唑鎓的反应得到α-肼基和α-偶氮酯,它们很容易被氢化成α-氨基酯。
Process for the preparation of .alpha.-aryl and .alpha.-heteroaryl
申请人:Agency of Industrial Science & Technology
公开号:US04772714A1
公开(公告)日:1988-09-20
Disclosed is a process for the preparation of alpha-aryl and alpha-heteroaryl ketones useful as intermediates in the synthesis of various pharmaceutical and agricultural chemicals, which process operates according to the following reaction scheme: ##STR1##
A process is disclosed for the preparation of .alpha.-substituted carbonyl compounds, wherein .alpha.-substituted ketone is prepared by the following reaction: ##STR1## .alpha.-azo ester is prepared by the following reaction: ##STR2## and .alpha.-hydrozono ester is prepared by the following reaction: ##STR3## wherein the .alpha.-azo ester and .alpha.-hydrazono ester obtained by the above reactions include novel compounds, which are also disclosed.
Reaction of silyl enol ethers with arenediazonium salts. Part 2. α-Amination of esters
作者:Toshiyasu Sakakura、Masayasu Hara、Masato Tanaka
DOI:10.1039/p19940000289
日期:——
Diazonium salts efficiently serve as electrophilic aminating reagents of esters. The reaction of arenediazonium tetrafluoroborates with ketene silyl ketals yielded α-azo or α-hydrazono esters in good to excellent yields under very mild conditions. Hydrogenation of those esters gave α-amino esters quantitatively.
Process for preparing .alpha.-substituted carbonyl compound
申请人:Agency of Industrial Science and Technology
公开号:US04908451A1
公开(公告)日:1990-03-13
A process is disclosed for the preparation of .alpha.-substituted carbonyl compounds, wherein .alpha.-substituted ketone is prepared by the following reaction: ##STR1## .alpha.-azo ester is prepared by the following reaction: ##STR2## and .alpha.-hydrozono ester is prepared by the following reaction: ##STR3## wherein the .alpha.-azo ester and .alpha.-hydrazono ester obtained by the above reactions include novel compounds, which are also disclosed.