2,2-Di(ethoxy)vinyllithium: Reactions with carbonyl compounds
作者:Abdelaziz Hiouni、Lucette Duhamel
DOI:10.1016/0040-4039(96)01163-x
日期:1996.7
2,2-Di(ethoxy)vinyllithium 2 generated from bromo ketene acetal 1 reacts with carbonyl compounds to give either β-hydroxy esters 5 or conjugated esters 6 or hydroxy ketene acetals 7 according to the work up.
Novel pyridinium dichromate (PDC) catalyzed oxidative rearrangement for the conversion of tertiary allylic alcohols to ß-substituted enones is described. Using a catalytic amount of PDC with PhI(OAc)2 as a co-oxidant in the presence of magnesium sulfate and water under oxygen was found effective for this rearrangement.
Process for producing fused imidazole compound, reformatsky reagent in stable form, and process for producing the same
申请人:Nuwa Shigeru
公开号:US20050043544A1
公开(公告)日:2005-02-24
The present invention provides an industrially advantageous process for producing a steroid C
17,20
lyase inhibitor represented by the general formula (I):
and a Reformatsky reagent in a stable form suitable for the process.
In the present invention, a compound represented by the general formula (I) is produced by reducing a specific β-hydroxy ester compound derivative or a salt thereof obtained from a specific carbonyl compound in a Reformatsky reaction in the presence of a metal hydride complex and a metal halide, and then subjecting it to a ring-closing reaction. In the above Reformatsky reaction, it is useful to use a stable solution of a compound represented by the general formula BrZnCH
2
COOC
2
H
5
or a crystal of the compound which is represented by the formula (BrZnCH
2
COOC
2
H
5
.THF)
2
.
PROCESS FOR PRODUCING FUSED IMIDAZOLE COMPOUND, REFORMATSKY REAGENT IN STABLE FORM, AND PROCESS FOR PRODUCING THE SAME
申请人:Takeda Pharmaceutical Company Limited
公开号:EP1471056B1
公开(公告)日:2012-07-11
Rhodium-Catalyzed Reformatsky-Type Reaction
作者:Kazuo Kanai、Hitoshi Wakabayashi、Toshio Honda
DOI:10.1021/ol006268c
日期:2000.8.1
[GRAPHICS]A novel Reformatsky type reaction was developed using RhCl(PPh3)(3) and diethylzinc. Inter- and intramolecular Reformatsky-type reactions were achieved efficiently under mild reaction conditions to give beta-hydroxy esters.