申请人:Nishino Shigeyoshi
公开号:US20080306287A1
公开(公告)日:2008-12-11
The present invention is to provide a process for preparing tetrahydropyran-4-carboxylic acid represented by the formula (1):
which comprises hydrolyzing a 4-cyanotetrahydropyran-4-carboxylic acid compound represented by the formula (2):
wherein R represents a hydrogen atom or a hydrocarbon group,
in the presence of an acid; a process for preparing a tetrahydropyran-4-carboxylic acid ester which comprises reacting the tetrahydropyran-4-carboxylic acid represented by the above-mentioned formula (1) with an alcohol in the presence of an acid; and a process for preparing tetrahydropyran-4-carboxylic acid amide which comprises reacting the tetrahydropyran-4-carboxylic acid represented by the above-mentioned formula (1) with a halogenating agent to prepare tetrahydropyran-4-carboxylic acid halide, and then, reacting an amine compound to the resulting compound.
本发明提供了一种制备式(1)所代表的四氢吡喃-4-羧酸的过程,其包括在酸的存在下水解式(2)所代表的4-氰基四氢吡喃-4-羧酸化合物:其中R代表氢原子或烃基;一种制备四氢吡喃-4-羧酸酯的过程,其包括在酸的存在下将上述式(1)所代表的四氢吡喃-4-羧酸与醇反应;以及一种制备四氢吡喃-4-羧酸酰胺的过程,其包括将上述式(1)所代表的四氢吡喃-4-羧酸与卤化试剂反应制备四氢吡喃-4-羧酸卤化物,然后将胺化合物与所得化合物反应。