[8-chloro-1-(2,2-dimethylpropionyloxymethyl)-7-(2-formylphenyl)-2,6-dioxo-1,2,6,7-tetrahydropurin-3-yl]methyl 2,2-dimethylpropionate 、
N-Boc-哌嗪 在
silica gel 、
ethyl acetate n-hexane 作用下,
以
氯仿 为溶剂,
反应 1.17h,
以to give 1.94 g of the title compound from the elution fraction of hexane-ethyl acetate (1:1)的产率得到t-butyl 4-[1,3-bis(2,2-dimethylpropionyloxymethyl)-7-(2-formylphenyl)-2,6-dioxo-2,3,6,7-tetrahydro-1H-purin-8-yl]piperazine-1-carboxylate