已开发出一种有效的方案,用于有机硼烷对苯并[ b ]噻吩1,1-二氧化物的不对称加氢芳基化和加氢烯基化反应。铑(I)预催化剂和手性二烯配体的组合构成了催化体系,该体系能够以高收率和高对映选择性轻松合成2,3-二氢苯并[ b ]噻吩1,1-二氧化物。该不对称氢芳基化与下游烷基化的合并以非对映异构的方式提供了包含两个具有高对映选择性的连续的季立体中心的2,3-二氢苯并[ b ]噻吩1,1-二氧化物。
Benzothienopyrazinedione compounds and their preparation and use
申请人:Novo Nordisk A/S
公开号:US05182279A1
公开(公告)日:1993-01-26
Novel [1]benzothieno[2,3-b]pyrazine-2,3(1H,4H)-diones or tautomeric forms thereof of the general formula (I) ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 independently represent hydrogen, halogen, alkyl, alkoxy or trifluoromethyl. The compounds are useful for treating a central nervous system ailment associated with the NMDA receptor-associated glycine site.
A novel series of carboxy-substituted naphthalenes and carboxy-substituted benzo-fused heterocycles, such as carboxy-substituted derivatives of indole, benzofuran and benzothiophene, has been prepared, including their pharmaceutically acceptable salts. These particular compounds are useful in therapy for the treatment of thrombosis, ischaemic heart disease, stroke, transient ischaemic attack, migraine, peripheral vascular disease, the vascular complications of diabetes and endotoxic shock. Preferred member compounds include 2-(1-imidazolylmethyl)-3-methylbenzo[b]thiophene-5-carboxylic acid and 3-methyl-2-(3-pyridylmethyl)benzo[b]thiophene-5-carboxylic acid, respectively. Methods for preparing these compounds from known starting materials are provided.
Method for preparing sulfone or sulfoxide compound
申请人:SUMITOMO CHEMICAL COMPANY, LIMITED
公开号:US20030171589A1
公开(公告)日:2003-09-11
There is provided a method for preparing a sulfone or sulfoxide compound, characterized in that a sulfide compound is allowed to react with hydrogen peroxide in the presence of a metal oxide catalyst formed by the reaction of hydrogen peroxide with at least one metal or metal compound selected from tungsten metal; molybdenum metal; a tungsten compound comprising tungsten and a Group IIIb, IVb, Vb, or VIb element exclusive of oxygen; and a molybdenum compound comprising molybdenum and a Group IIIb, IVb, Vb, or VIb element exclusive of oxygen.
A novel series of carboxy-substituted naphthalenes and carboxy-substituted benzo-fused heterocycles, such as carboxy-substituted derivatives of indole, benzofuran and benzothiophene, has been prepared, including their pharmaceutically acceptable salts. These particular compounds are useful in therapy for the treatment of thrombosis, ischaemic heart disease, stroke, transient ischaemic attack, migraine, peripheral vascular disease, the vascular complications of diabetes and endotoxic shock. Preferred member compounds include 2-(1-imidazolylmethyl)-3-methylbenzo[b]thiophene-5-carboxylic acid and 3-methyl-2-(3-pyridylmethyl)benzo[b]thiophene-5-carboxylic acid, respectively. Methods for preparing these compounds from known starting materials are provided.