发明名称 Process for preparation of 1,3-dioxolane-4-methanol compounds
摘要 PCT No. PCT/JP97/03165 Sec. 371 Date Feb. 8, 1999 Sec. 102(e) Date Feb. 8, 1999 PCT Filed Sep. 9, 1997 PCT Pub. No. WO98/11087 PCT Pub. Date Mar. 19, 1998A process for preparing easily and economically a 1,3-dioxolane-4-methanol compound in a racemic form or an optically active form with high purity and in high yield. The process comprises reacting an alkali metal or alkaline earth metal salt of an alcohol or a carboxylic acid with a halogenomethyl-1,3-dioxolane which is prepared by acetalizing a halogeno-1,2-propanediol of a formula (1) wherein X is a halogen atom, in an acid catalyst to conduct esterification or etherification, and then hydrolyzing the ester group and hydrogenolyzing the ether group to prepare a 1,3-dioxolane-4-methanol compound of a formula (5) wherein R1 and R2 are hydrogen atom, alkyl having 1 to 4 carbon atoms or phenyl, and R1 and R2 may form a cycloalkyl ring having 3 to 6 carbon atoms with the adjacent carbon atoms.
申请公布号 US6143908(A) 申请公布日期 2000.11.07
申请号 US19990242059 申请日期 1999.02.08
申请人 DAISO CO., LTD. 发明人 HINOUE, KAZUMASA;FURUKAWA, YOSHIRO
分类号 C07D317/20;C07D317/22;(IPC1-7):C07D317/20;C07D493/10 主分类号 C07D317/20
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