Abstract:
A process for producing a 4-(un)substituted tetrahydropyran-4-carboxylic acid compound or an ester compound thereof which are represented by the formula (1): (1) (wherein R represents hydrogen or a hydrocarbon group; R represents hydrogen or an optionally substituted hydrocarbon group; and R represents hydrogen or a hydrocarbon group), characterized by reacting a 4-(un)substituted 4-cyanotetrahydropyran compound represented by the formula (2): (2) (wherein R and R are the same as defined above) with water or an alcohol which are represented by the formula (3): R OH (3) (wherein R is the same as defined above) in the presence of an acid or base.
Abstract translation:用于制备由式(1)表示的4-(un)取代的四氢吡喃-4-羧酸化合物或其酯化合物的方法:(1)(其中R 1表示氢或烃基; R 其特征在于使由式(2)表示的4-(un)取代的4-氰基四氢吡喃化合物:(2)代表氢或任选取代的烃基; R 3表示氢或烃基) (其中R 1和R 2与上述定义相同)与由式(3)表示的水或醇反应:R 3 OH(3)(其中R 3相同 如上所定义)在酸或碱的存在下进行。
Abstract:
Quinazolin-4-one or a derivative thereof is reacted with a chlorinating agent in a first organic solvent in the presence of an organic base. Subsequently, the reaction product is reacted with an amine compound represented by the formula R5-NH-R6 (R5 and R6 each represents hydrogen or an optionally substituted hydrocarbon group) in the presence of a second organic solvent. Thus, a 4-aminoquinazoline derivative can be obtained.
Abstract:
A process for producing a quinazolin−4−one derivative represented by the following formula (2): (2) (wherein R 1 , R 2 , R 3 , and R 4 each represents a group not participating in the reaction and R 1 , R 2 , R 3 , and R 4 may be bonded to each other to form a ring) which comprises reacting an anthranilic acid derivative represented by the following formula (1): (1) (wherein R 5 represents hydrogen or a hydrocarbon group) with a formic acid derivative in the presence of an ammonium carboxylate.
Abstract:
A process for the preparation of 5−halogenoindoles represented by the general formula (3): (3) [wherein X is halogeno], characterized by comprising the first step of decarboxylating a 2−(5−halogeno−2−nitrophenyl)−2 −cyanoacetate represented by the general formula (1): (1) [wherein R is hydrocarbyl and X is as defined above] into a 5−halogeno−2−nitrobenzyl cyanide represented by the general formula (2): (2) [wherein X is as defined above] and the second step of cyclizing the 5−halogeno−2−nitrobenzyl cyanide under reducing conditions.
Abstract:
2-Cyclopropyl-4-(4'-fluorophenyl)quinoline-3-carboxyaldehyde, which is useful as a starting materials for drugs, can be obtained by reacting 3-cyclopropyl-3-oxopropanenitrile with 2-amino-4'-fluorobenzophenone to thereby give 2-cyclopropyl-4-(4'-fluorophenyl)quinoline-3-carbonitrile and then reducing this product.