Sulfonic acid ester derivatives represented by the general formula (4) or (5) are produced by reacting an amino alcohol derivative represented by the general formula (1) or (2) with an organic sulfonyl halide represented by the general formula (3), in a mixed solvent composed of an aprotic organic solvent and water in the presence of a non-water-prohibiting inorganic base. This procedure can be carried out in a simple, easy, safe and economical manner while reducing the load on the environment.
1
Wherein n represents an integer of 0 to 5, A represents a phenyl group, which may be substituted, R represents a methanesulfonyl, ethanesulfonyl, p-toluenesulfonyl or p-nitrobenzenesulfonyl group and X represents a chloride, bromine or iodine atom.
Biphenyl compounds useful as muscarinic receptor antagonists
申请人:Mammen Mathai
公开号:US20050203133A1
公开(公告)日:2005-09-15
This invention provides compounds of formula I:
wherein a, b, c, d, m, n, p, s, t, W, Ar
1
, R
1
, R
2
, R
3
, R
4
, R
6
, R
7
, and R
8
are as defined in the specification. The compounds of formula I are muscarinic receptor antagonists. The invention also provides pharmaceutical compositions containing such compounds, processes and intermediates for preparing such compounds and methods of using such compounds to treat pulmonary disorders.
Several kinds of water-soluble dihydropyridine vasodilators were prepared and their vasodilating activities were evaluated. Among them, 2-(N-benzyl-N-methylamino)-ethyl methyl 2, 6-dimethyl-4-(m-nitrophenyl)-1, 4-dihydropyridine-3, 5-dicarboxylate hydrochloride (YC-93) was found to have outstanding activity and bioavailability. Various synthetic routes for this compound were examined.
Catalytic Hydrogenation for the Preparation of Amines from Amide Acetals, Ketene N,O-Acetals or Ester Imides
申请人:EVONIK INDUSTRIES AG
公开号:US20160264513A1
公开(公告)日:2016-09-15
The present invention relates to a process for the preparation of amines, comprising the following steps: Reaction of a (i) amide acetal of the general formula (I), or (ii) ketene N,O-acetal of the general formula (II), or (iii) ester imide of the general formula (III) with H
2
in the presence of a hydrogenation catalyst, where catalyst and amide acetal or ketene N,O-acetal or ester imide are used in a molar ratio of from 1:10 to 1:100 000 and where a hydrogen pressure of from 0.1 bar to 200 bar is established and where a temperature in the range of from 0° C. to 250° C. is established.