申请人:Takeda Chemical Industries, Ltd.
公开号:US04339586A1
公开(公告)日:1982-07-13
Pyridoxine or its acid addition salt is produced by reacting 4-carboxymethyl-5-substituted oxy-oxazoles with 4,7-dihydro-1,3-dioxepines in the presence of a compound of the formula ##STR1## wherein X is oxygen, --NH--, or --NH--NH-- and, then, subjecting the resultant compound to hydrolysis. This process offers industrially more advantageous production of pyridoxine than hitherto known processes.
吡哆醇或其酸加成盐是通过将4-羧甲基-5-取代氧-噁唑烷与4,7-二氢-1,3-二氧杂环庚烷在化合物的存在下反应,所述化合物的公式为##STR1##其中X为氧,--NH--或--NH--NH--,然后将所得化合物进行水解而制得。该过程比迄今为止已知的过程更具工业优势。