The present invention provides a solventless process for the catalytic hydrogenation of esters of 4,4,4-trihaloacetoacetic acid using a platinum catalyst in the presence of an acid or base co-catalyst to provide the analagous 3-hydroxybutyrate ester. Such 3-hydroxybutyrate esters are useful as solvents, cleaners or fine chemical intermediates.
Reformatsky reactions of trifluoroacetaldehyde with lower bromoesters gave their corresponding adducts. The reaction of trifluoroacetaldehyde with methyl 2-(bromomethyl)acrylate gave γ-trifluoromethyl-α-methylene-γ-butyrolactone.
Preparation of trifluoromethylated allylic alcohols from trifluoroacetaldehyde and organometallic compounds
作者:Nobuo Ishikawa、Gyu Koh Moon、Tomoya Kitazume、Kwon Choi Sam
DOI:10.1016/s0022-1139(00)83162-0
日期:1984.4
A number of allylic alcohols bearing a trifluoromethyl group at the α- or γ-position, and α-trifluoromethylated γ-enols and -ynols were prepared by the reaction of trifluoroacetaldehyde with a variety of organometalliccompounds. Most of the Reformatsky- or Grignard-type reactions required promotion by ultrasonic irradiation.
This invention relates to analogs of peptidase substrates in which the amide group containing the scissile amide bond of the substrate peptide has been replaced by an activated electrophilic ketone moiety. These analogs of the peptidase substrates provide specific enzyme inhibitors for a variety of proteases, the inhibition of which will have useful physiological consequences in a variety of disease states.
Process for the preparation of substituted 3-hydroxybutyrate esters
申请人:ROHM AND HAAS COMPANY
公开号:EP1052240A1
公开(公告)日:2000-11-15
The present invention provides a solventless process for the catalytic hydrogenation of esters of 4,4,4-trihaloacetoacetic acid using a platinum catalyst in the presence of an acid or base co-catalyst to provide the analagous 3-hydroxybutyrate ester. Such 3-hydroxybutyrate esters are useful as solvents, cleaners or fine chemical intermediates.