Process for producing quinazolin-4-one and derivatives thereof
申请人:Nishino Shigeyoshi
公开号:US20050124809A1
公开(公告)日:2005-06-09
A process for preparing quinazolin-4-one or its derivative by reacting anthranilic acid or its derivative with formic acid or its derivative in the presence of ammonia, or by reacting ammonium anthranilate or its derivative with formic acid or its derivative.
Process for producing etoposide and intermediate for use therein
申请人:NIPPON KAYAKU KABUSHIKI KAISHA
公开号:EP0162701A2
公开(公告)日:1985-11-27
Etoposide is produced by reacting a 4'-halogenoatetyl-4'-demethylepipodophyllotoxin-β-D-2,3-di-O-halogenoacetyl-4,6-O-ethylideneglucoside represented by the formula (III):
wherein
R, and R2, which may be the same or different, each represent -COCHX2 or -COCX3 wherein X represents a halogen atom, with an alcohol, an amine and/or ammonia to remove the halogenoacetyl groups so as to obtain etoposide.
The invention relates to a method for producing aniline, comprising the steps of: a) providing o-aminobenzoate, wherein said o-aminobenzoate comprises anthranilate anion and a suitable cation, b) converting said anthranilate anion to aniline by thermal decarboxylation in the presence or absence of a catalyst, c) extracting the aniline produced in step b) in an organic solvent at least once, and d) purifying the aniline produced in steps b) and c) by distillation, wherein said distillation produces aniline and a water phase.
本发明涉及一种生产苯胺的方法,包括以下步骤a) 提供邻氨基苯甲酸酯,其中所述邻氨基苯甲酸酯包括蚁酸阴离子和适当的阳离子;b) 在有催化剂或无催化剂的情况下,通过热脱羧将所述蚁酸阴离子转化为苯胺;c) 在有机溶剂中至少萃取一次步骤 b) 中生成的苯胺;以及 d) 通过蒸馏纯化步骤 b) 和 c) 中生成的苯胺,其中所述蒸馏生成苯胺和水相。
Thermal decomposition of scandium(III) o-nitrobenzoate, o-chlorobenzoate, o-methylbenzoate, o-hydroxybenzoate and o-aminobenzoate in air atmosphere