Process for the preparation of trimethoprim and novel intermediates for use therein
申请人:Farmos-Yhtyma Oy
公开号:EP0067593A1
公开(公告)日:1982-12-22
Trimethoprim, i.e. 5-[(3,4,5-trimethoxyphenyl) methyl]-2,4-pyrimidinediamine of the formula
is advantageously prepared by reacting two moles of 3,4,5-trimethoxybenzaldehyde with 1 mol of 3,3'-(phenylenedi-iminoldipropanenitrile in the presence of an alkaline condensing agent to form a condensation product of formula:
which is then reacted with guanidine to give the compound of formula (I).
Bates et al., Journal of the Chemical Society, 1956, p. 388,395
作者:Bates et al.
DOI:——
日期:——
Tandem bis-aza-Michael addition reaction of amines in aqueous medium promoted by polystyrenesulfonic acid
作者:Vivek Polshettiwar、Rajender S. Varma
DOI:10.1016/j.tetlet.2007.10.008
日期:2007.12
An efficient and environmentally benign tandem bis-aza-Michael addition of amines catalyzed by polystyrenesulfonic acid (PSSA) is described. This operationally simple high yielding microwave assisted synthetic protocol proceeded in water in the absence of any organic solvent. (c) 2007 Elsevier Ltd. All rights reserved.
Cupric Acetate Catalyzed Monocyanoethylation of Aromatic Amines