Aqueous N-methylmorpholine N-oxide as a new medium for alkylation of pyrazoles
作者:Ani H. Hasratyan、Ashkharuhi G. Alexanyan、Hasmik N. Khachatryan、Geghetsik B. Zakaryan、Sargis S. Hayotsyan、Gevorg G. Danagulyan、Hovhannes S. Attaryan
DOI:10.1007/s10593-018-2342-7
日期:2018.7
It is shown that alkylation of pyrazoles with (E)/(Z)-1,3-dichlorobut-2-enes can be carried out in an alkaline aqueous medium in the presence of N-methylmorpholine N-oxide. In some cases, this technique may substitute phase-transfer catalysis. Conformational analysis of the reaction products showed that a mixture of (E)/(Z) isomers is formed in a ratio of 9:1.
4-AMINO-5-METHYLPYRAZOLE DERIVATIVES AND PROCESS FOR PRODUCTION THEREOF
申请人:Sankyo Agro Company, Limited
公开号:EP1580189A1
公开(公告)日:2005-09-28
The present invention relates to 4-amino-5-methylpyrazole derivatives represented by the following formula (I):
(wherein R1 represents an isobutyl group, a cyclobutylmethyl group, a neopentyl group or the like) or a salt thereof, which are novel compounds being useful as synthetic intermediates of pharmaceuticals, agricultural chemicals or the like.