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    • 9. 发明申请
    • PROCESS FOR THE PREPARATION OF ALKYL 1-METHYLCYCLOPROPANECARBOXYLATE
    • 制备1-甲基环丙烷甲酸烷基酯的方法
    • WO02010116A2
    • 2002-02-07
    • PCT/US2001/022704
    • 2001-07-19
    • C07C67/00C07C67/307C07C67/317C07C209/56C07C211/35C07C69/74C07C69/63
    • C07C209/56C07C67/00C07C67/307C07C67/317C07C2601/02C07C69/74C07C69/63C07C211/35
    • Disclosed is a 4-step process for the preparation of alkyl esters of 1-methylcyclopropanecarboxylic acid which comprises the steps of (1) converting gamma -butyrolactone to alpha -methyl- gamma -butyrolactone; (2) converting the alpha -methyl- gamma -butyrolactone from step (1) to an alkyl 4-halo-2-methyl-butyrate; (3) producing a xylene solution of the alkyl 4-halo-2-methyl-butyrate; and (4) contacting the xylene solution of the alkyl 4-halo-2-methylbutyrate from step (3) with an alkali metal alkoxide under conditions to temperature and pressure which causes vaporization of (i) an alkanol as it is fomred and (ii) an alkyl 1-methylcyclopropanecarboxylate as it si formed from the alkyl 4-halo-2-methylbutyrate. Also disclosed are processes whereby the alkyl 1-methylcyclopropanecarboxylate, prepared as described above, is converted to 1-methylcyclopropylamine.
    • 本发明涉及四步制备1-甲基环丙烷羧酸烷基酯的方法,其由1)将γ-丁内酯转化成α-甲基-γ-丁内酯; 2)将步骤(1)中获得的α-甲基-γ-丁内酯转化为4-卤代-2-甲基丁酸烷基酯; 3)制备4-卤代-2-甲基丁酸烷基酯的二甲苯溶液; 和4)使步骤(3)中得到的4-卤代-2-甲基丁酸烷基酯的二甲苯溶液与碱金属醇盐在导致汽化的温度和压力条件下接触,i)d 形成的烷醇和ii)由4-卤代-2-甲基丁酸烷基酯形成的1-甲基环丙烷羧酸烷基酯。 本发明还涉及其中将如上所述制备的1-甲基环丙烷羧酸烷基酯转化成1-甲基环丙胺的方法。