Synthesis of a water soluble boron neutron capture therapy agent: 1-amino-3-[2-(7-{3-[2-(2-hydroxymethyl-ethoxy)-1-(2-hydroxy-1-hydroxymethyl-ethoxymethyl)ethoxy]propyl}-1,7-di-carba-closo-dodecaboran-1-yl)ethyl]cyclobutanecarboxylic acid
作者:Bhaskar C Das、George W Kabalka、Rajiv R Srivastava、Weiliang Bao、Sasmita Das、Guisheng Li
DOI:10.1016/s0022-328x(00)00630-6
日期:2000.12
3-[2-(2-benzyloxy-1-benzyloxymethyl-ethoxy)-1-(2-benzyloxy-1-benzyloxymethyl-ethoxymethyl)ethoxy]propyl ester which gave the required precursor ketone which was then converted to the title amino acid via a Bücherer–Strecker synthesis followed by hydrogenolysis to remove the benzyl protecting groups.
含有级联多元醇,1-氨基-3- [2-(7- 3- [2-(2-羟甲基-乙氧基)-1-(2-羟基-1-羟甲基-乙氧基甲基)乙氧基]丙基} -1,7-二- carba-闭合碳-dodecaboran -1-基)乙基]环丁烷羧酸,已经研制成功。在合成中的关键步骤是烷基化3- [2-(1,7- dicarba-闭合碳-dodecarboran -1-基)乙基]环丁酮hemithioketal与甲苯-4-磺酸3- [2-(2-苄氧基-1-苄氧基甲基-乙氧基)-1-(2-苄氧基-1-苄氧基甲基-乙氧基甲基)乙氧基]丙酸酯可提供所需的前体酮,然后通过Bücherer-Strecker合成将其转化为标题氨基酸,然后进行氢解除去苄基保护基。