摘要:
Optically active 1,4-dihydropyridine derivatives represented by general formula (I) and anion salts thereof and a production method therefor: ##STR1## (wherein R.sup.1 represents a C.sub.1-6 alkyl group, R.sup.2 represents a nitrogen-containing heterocyclic group forming a quaternary ammonium which may be substituted, and n is an integer of 1, 2 or 3). The optically active 1,4-dihydropyridine derivatives represented by general formula (I) have vasodilating activity and hypotensive activity and are excellent in water solubility so that they are useful as a drug for circulatory system such as a hypotensor or vasodilator.
摘要:
Salicylamide derivatives represented by formulae (1a) and (1b); intermediates in the production thereof; a process for producing the same; and drugs containing the same as the active ingredient. The salicylamide derivatives represented by formulae (1a) and (1b) are useful as anti-inflammatory agents and immunosuppressive agents which exert an effect of inhibiting the activation of NF-&kgr;B with little side effects.
摘要:
Optically active 1,4-dihydropyridine derivatives represented by general formula (I), process for preparing compounds (Ic) (in general formula (I) , R.sup.1 is a lower alkyl group), process for preparing compounds represented by general formula (II) by hydrolyzing the compounds (Ic) under acidic conditions, process for preparing compounds represented by general formula (II) by solvolysis, under basic conditions, of compounds represented by general formula (III); ##STR1## wherein R.sup.1 is H, a lower alkyl group, a cyanoethyl group, a lower alkanoylaminoethyl group, or a lower dialkylaminoethyl group; R.sup.2 is a 2-tetrahydropyranyl group or a lower alkyloxymethyl group; R.sup.3 is a cyano group, a lower dialkylamino group or a lower alkanoylamino group; and R.sup.4 is a lower alkyl group. The compounds of general formula (I) and (II) are intermediate compounds for preparing optically active 1,4-dihydropyridine derivatives which are useful as medicines for circulatory organs. The compounds can be produced efficiently by the process of the present invention.
摘要:
This invention provides DNA fragments for efficiently preparing a protein having asymmetric hydrolase activity for 4-substituted 1,4-dihydropyridine derivatives, transformants obtained by using such a DNA fragment, and a process for preparing the aforesaid enzyme. Specifically, an isolated gene derived from the chromosome of Streptomyces viridosporus and encoding a protein having asymmetric hydrolase activity for 4-substituted 1,4-dihydropyridine derivatives, plasmids having the aforesaid gene integrated thereinto, transformants obtained by using such a plasmid, and a process for preparing the aforesaid enzyme by using such a transformant are disclosed. A process for the enzymatic conversion of 4-substituted 1,4-dihydropyridine derivatives by using the aforesaid enzyme is also disclosed.
摘要:
This invention provides DNA fragments for efficiently preparing a protein having asymmetric hydrolase activity for 4-substituted 1,4-dihydropyridine derivatives, transformants obtained by using such a DNA fragment, and a process for preparing the aforesaid enzyme. Specifically, an isolated gene derived from the chromosome of Streptomyces viridosporus and encoding a protein having asymmetric hydrolase activity for 4-substituted 1,4-dihydropyridine derivatives, plasmids having the aforesaid gene integrated thereinto, transformants obtained by using such a plasmid, and a process for preparing the aforesaid enzyme by using such a transformant are disclosed. A process for the enzymatic conversion of 4-substituted 1,4-dihydropyridine derivatives by using the aforesaid enzyme is also disclosed.
摘要:
Disclosed are 1,4-dihydropyridine derivatives represented by the general formula (I) and salts thereof, as well as optical active 1,4-dihydropyridine derivatives represented by the general formula (II) and salts thereof which are obtained from the derivative by biochemical reactions using microorganisms or enzymes and useful as preventive and therapeutic agents for ischemic heart diseases and hypertension. ##STR1## (wherein x and Y are H, NO.sub.2, CN, halogen; R.sup.1 and R.sup.2 are H, CHO, substituted alkylcarbonyl, crotonyl, cinnamoyl, alkoxycarbonyl, aryloxycarbonyl, benzyloxycarbonyl, carboxybenzoyl, or R.sup.1 and R.sup.2 taken together represent phthaloyl; n is an integer of 1 to 3).
摘要:
(4R)-3-(Substituted aminoalkyl)oxycarbonyl-1,4-dihydro-2,6-dimethyl-4-(nitrophenyl)pyridine-5-carboxylic acids can be prepared efficiently, by reacting bis(substituted aminoalkyl) 1,4-dihydro-2,6-dimethyl-4-(nitrophenyl)pyridine-3,5-dicarboxylates with a microorganism capable of asymmetric hydrolysis and belonging to the genus Streptomyces, the genus Paecilomyces, the genus Botryodioplodia, the genus Alternaria or the genus Helminthosporium, or a treated product thereof. The compounds are extremely useful as important intermediates for preparation of pharmaceuticals useful for the prevention and treatment of angina pectoris, hypertension, etc.
摘要:
Provided are an isolated gene capable of participating in the production of L-homoglutamic acid, and a production system of L-homoglutamic acid by using this gene. The gene is derived from the genome of Flavobacterium lutescens.
摘要:
Provided are an isolated gene capable of participating in the production of L-homoglutamic acid, and a production system of L-homoglutamic acid by using this gene. The gene is derived from the genome of Flavobacterium lutescens.
摘要:
Provided is a process for producing an isocoumarin-3-yl-acetic acid derivative, characterized by reacting a homophthalic acid derivative represented by a formula: (wherein Rc, R2 and R are mainly protecting groups) with a malonic acid derivating represented by a formula: (wherein R is an organic group including a lower alkyl group; R3 is a protecting group for a carboxyl group; and X is a halogen atom or a —OM group (wherein M is alkaline metal or alkaline earth metal)). According to the above process, various isocoumarin-3-yl-acetic acid derivatives can efficiently be provided.