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    • 3. 发明授权
    • Process for the preparation of cyclic esters
    • 环酯的制备方法
    • US6107496A
    • 2000-08-22
    • US261132
    • 1999-03-03
    • Clemens OsterholtJosef MetzGuenther Koehler
    • Clemens OsterholtJosef MetzGuenther Koehler
    • C07B61/00C07D321/00C07D323/04C07D407/00
    • C07D321/00Y02P20/582
    • A process for the preparation of cyclic esters of the general formula: ##STR1## in which m is an integer from 6-14 and n is an integer from 2-6, which comprises heating a dicarboxylic acid bis(glycol) ester of the general formula:HO--(CH.sub.2).sub.n --O--CO--(CH.sub.2).sub.m --CO--O--(CH.sub.2).sub.n --OH, formula IIin which m and n are as defined above,(b) optionally, up to 100% by weight, based on the weight of ester II, of esters of the general formula:H[O--(CH.sub.2).sub.n --O--CO--(CH.sub.2).sub.m --CO--].sub.x --O--(CH.sub.2).sub.n --OH, formula IIIH[O--(CH.sub.2).sub.n --O--CO--(CH.sub.2).sub.m CO--]X--OH and/orformula IVHO--CO--(CH.sub.2).sub.m --CO--[--O--(CH.sub.2).sub.n O--CO--(CH.sub.2).sub.m --CO--].sub.x --OH, formula Vin which m and n are as defined previously and x is an integer >1, and(c) a glycol of the general formula:HO--(CH.sub.2).sub.n --OH, formula VIin which n has the same numerical value as in formula I-V,(d) an inert high-boiling reaction medium, and(e) a catalyst.
    • 一种制备通式的环酯的方法:其中m是6-14的整数,n是2-6的整数,其包括加热通式为HO的二羧酸双(二醇)酯 - (CH 2)n O-CO-(CH 2)m -CO-O-(CH 2)n -OH,其中m和n如上所定义的式IIin,(b)任选地,至多100重量% 酯II的通式为H [O-(CH 2)n O-CO-(CH 2)m -CO-] x O - (CH 2)n -OH的酯,式IIIH [O-(CH 2)n O- CO-(CH 2)m CO-] X-OH和/或式IVHO-CO-(CH 2)m -CO- [-O-(CH 2)n O-CO-(CH 2)m -CO-] x-OH,式Vin 其中m和n如前定义,x是> 1的整数,和(c)通式为HO-(CH 2)n -OH的二醇,其中n具有与式IV相同的数值, (d)惰性高沸点反应介质,和(e)催化剂。