A process for preparing 5-substituted pyrrolo[2,3-d]pyrimidines which are useful as intermediates for the preparation of pyrrolo[2,3-d]pyrimidine antineoplastic agents, of formula I
wherein
R i s NHC*H(COOR1)CH2CH2COOR1 or OR1;
each R1 is H or the same or different carboxy protecting group ;
the configuration about the carbon atom designated * is L ;
n is 0 or 1; and
is an aryl group which may be substituted ;
or a salt thereof, which comprises
a) reacting 2,4-diamino-6-hydroxypyrimidine with a haloaldehyde of formula II
wherein
Y is bromo, chloro or iodo ; and Ⓐ, R, R1, n and * areas defined above ; and
b) optionally salifying the reaction product from step a).
一种制备5-取代
吡咯并[2,3-d]
嘧啶的方法,该方法可用作制备
吡咯并[2,3-d]
嘧啶类
抗肿瘤药物的中间体,其
化学式为I,其中R为NHC*H(COOR1)CH2CH2COOR1或OR1;每个R1为H或相同或不同的羧基保护基;指定*的碳原子的构型为L;n为0或1;并且是可能被取代的芳基基团;或其盐,其包括a)将2,4-二
氨基-6-
羟基嘧啶与
化学式II的卤代醛反应,其中Y为
溴、
氯或
碘;并且Ⓐ、R、R1、n和*如上所定义;并且b)可选地将步骤a)的反应产物盐化。