1-chloro-2-deoxy-3,5-di-O-(p-toluoyl)-α-D-erythropentofuranose 、
4-chloro-5-methyl-2-methylthiopyrrolo[2,3-d]pyrimidine 在
sodium hydride 作用下,
以
正己烷 、
乙腈 为溶剂,
以6.1 g (72%)的产率得到4-chloro-5-methyl-2-methylthio-7-[α-D-erythro-pentofuranosyl]pyrrolo[2,3-d]pyrimidine