申请人:SHELL INTERNATIONALE RESEARCH
MAATSCHAPPIJ B.V.
公开号:EP0199413A2
公开(公告)日:1986-10-29
Process for the preparation of a compound of formula or a salt thereof
wherein R, represents a hydrogen atom or a group of formula R2SO2 or phenyl-CH(R3)-wherein R2 represents a phenyl, tolyl or C1-4 alkyl group and R3 represents a hydrogen atom or a phenyl or C 1.4 alkyl group, which process comprises contacting nickel in an oxidation state of at least 3 with a 3-hydroxymethyl azetidine derivative of formula
wherein R4 represents a group of formula R2SO2 or phenyl-CH(R3)-and R5 represents a hydrogen atom or a hydroxymethyl group or a group of formula COOH or a salt thereof, followed, where R5 is not a hydrogen atom, by the decarboxylation of the compound of the 3,3-dicarboxylic intermediate product or a salt thereof and. if desired to produce a compound in which R. represents a hydrogen atom, by deprotection of the N-atom. Also. novel N-substituted azetidine carboxylate derivatives of the formula
wherein X represents a group CH2OH or COOY where Y represents a hydrogen or an alkali or alkaline earth metal atom.
式化合物或其盐的制备工艺
其中 R 代表氢原子或式 R2SO2 或苯基-CH(R3)-的基团,其中 R2 代表苯基、甲苯基或 C1-4 烷基,R3 代表氢原子或苯基或 C 1.4 烷基,该工艺包括使氧化态至少为 3 的镍与式 3-羟甲基氮杂环丁烷衍生物接触
其中 R4 代表式 R2SO2 或苯基-CH(R3)-的基团,R5 代表氢原子或羟甲基或式 COOH 的基团或其盐,如果 R5 不是氢原子,则将 3,3-二羧酸中间产物的化合物或其盐脱羧,如果需要制得 R.代表氢原子的化合物,则对 N 原子进行脱保护。此外,还有式中的新型 N-取代氮杂环丁烷羧酸盐衍生物
其中 X 代表基团 CH2OH 或 COOY 其中 Y 代表氢原子或碱金属或碱土金属原子。