Process for preparing 2,2-difluoroethylamine derivatives, wherein compounds of the general formula (IV) are reduced to the corresponding 2,2-difluoroethylamine derivatives of the general formula (III), where the A radical is as defined in the description:
The present invention relates to a process for preparing 4-aminobut-2-enolides and also corresponding intermediates and starting compounds which are passed through or used in the process according to the invention.
Novel Process for the Preparation of 4-Aminobut-2-enolides
申请人:LUI Norbert
公开号:US20110054182A1
公开(公告)日:2011-03-03
Process for the preparation of 4-aminobut-2-enolide compounds of the formula (I):
comprising reaction of a 4-(methylamino)furan-2(5H)-one compound of the formula (II)
with an amine of the formula (III)
in which R
1
and A have the definitions mentioned in the description, optionally in the presence of a Brønstedt acid.
NOVEL PROCESS FOR THE PREPARATION OF 4-AMINOBUT-2-ENOLIDES STARTING FROM 4-ALKOXYFURAN-2(5H)-ONE OR 4-ARYLALKOXYFURAN-2(5H)-ONE
申请人:LUI Norber
公开号:US20110152534A1
公开(公告)日:2011-06-23
Process for the preparation of 4-aminobut-2-enolide compounds of the formula (I):
comprising
reaction of a 4-alkoxyfuran-2(5H)-one compound or 4-arylalkoxyfuran-2(5H)-one compound of the formula (II)
with an amine of the formula (III)
in which R
1
, R
2
and A have the definitions given in the description, in the presence of a Brønstedt acid.
NOVEL METHOD FOR PRODUCING ENAMINOCARBONYL COMPOUNDS
申请人:Lui Norbert
公开号:US20120016132A1
公开(公告)日:2012-01-19
The present invention relates to a process for the preparation of enaminocarbonyl compounds of the formula (I)
where compounds of the formula (II)
are reacted in the presence of a Brønsted acid to give compounds of the formula (I), and A, R1 and Z are as defined in the description, and also corresponding starting compounds which are used in the process according to the invention.