3-(2-hydroxyethyl)hydrazono-2-hydroxyiminopropionitrile 以
正丁醇 为溶剂,
反应 4.0h,
以to give 0.61 g (isolation yield: 64%) of 5-amino-1-(2-hydroxyethyl)-4-nitrosopyrazole as reddish orange crystal的产率得到2-(5-氨基-4-亚硝基吡唑-1-基)乙醇
参考文献:
名称:
Process for producing 3-unsubstituted 5-amino-4-nitrosopyrazole compound, and 2-hydroxyimino-3-oxopropionitrile, 3-hydrazono-2-hydroxyiminopropionitrile compound, and processes for producing these
3,3-Dialkoxy-2-hydroxyiminopropionitriles, process for preparation thereof and process of preparing 5-amino-4-nitrosopyrazoles or salts thereof by the use of the same
申请人:UBE INDUSTRIES, LTD.
公开号:US20040116732A1
公开(公告)日:2004-06-17
The present invention is to provide a 3,3-dialkoxy-2-hydroxyiminopropionitrile represented by the formula (1):
1
wherein R
1
and R
2
may be the same or different from each other, and each represent an alkyl group having 1 to 8 carbon atoms,
a process for preparing the same, and a process for preparing a 5-amino-4-nitrosopyrazole compound represented by the formula (4):
2
wherein R
4
represents a hydrogen atom, an alkyl group which may have a substituent(s) or an aryl group which may have a substituent(s),
or an acid salt thereof using the same.
The present invention relates to a compound of the formula [I]:
1
wherein
R
1
is lower alkyl, hydroxy(lower)alkyl or halo(lower)alkyl, and
R
2
is hydrogen or amino protecting group, or
R
1
and R
2
are bonded together and form lower alkylene or lower alkenylene;
R
3
is hydrogen or lower alkyl;
R
4
is
2
R
5
is carboxy or protected carboxy; and
R
6
is amino or protected amino,
or a pharmaceutically acceptable salt thereof, a process for preparing a compound of the formula [I], and a pharmaceutical composition comprising a compound of the formula [I] in admixture with a pharmaceutically acceptable carrier.
3,3-dialkoxy-2-hydroxyiminopropionitriles, process for preparation thereof and process of preparing 5-amino-4-nitrosopyrazoles or salts thereof by the use of the same
申请人:Ube Industries, Ltd.
公开号:US07227032B2
公开(公告)日:2007-06-05
The present invention is to provide a 3,3-dialkoxy-2-hydroxyiminopropionitrile represented by the formula (1):
wherein R1 and R2 may be the same or different from each other, and each represent an alkyl group having 1 to 8 carbon atoms,
a process for preparing the same, and a process for preparing a 5-amino-4-nitrosopyrazole compound represented by the formula (4):
wherein R4 represents a hydrogen atom, an alkyl group which may have a substituent(s) or an aryl group which may have a substituent(s),
or an acid salt thereof using the same.
3,3-DIALKOXY-2-HYDROXYIMINOPROPIONITRILES, PROCESS FOR PREPARATION THEREOF AND PROCESS OF PREPARING 5-AMINO -4-NITROSOPYRAZOLES OR SALTS THEREOF BY THE USE OF THE SAME