The synthesis of a carborane gadolinium-DTPA complex for boron neutron capture therapy
作者:Hisao Nemoto、Jianping Cai、Hiroyuki Nakamura、Masaru Fujiwara、Yoshinori Yamamoto
DOI:10.1016/s0022-328x(99)00049-2
日期:1999.6
palladium-catalyzed reaction of allyl ethyl carbonate 9 with diethylenetriamine-N-ethoxycarbonyl acetic-N,N′,N″,N″-tetraacetic acid hexaethyl ester 7. This method can be applied to the synthesis of a Gd–carborane complex. The reaction of the hexaethyl ester 7 with carboranyl allyl carbonate 13a proceeded very smoothly under Pd(dba)2/2dppe catalyst (10 mol%) in THF at 50°C, giving the C–C bond formation
五羧酸盐DTPA衍生物(5和10)经烯丙基乙酯的钯催化的反应,合成9与二亚乙基ñ -乙氧羰acetic- Ñ,Ñ ',Ñ “,Ñ ” -四乙酸六乙基酯7。该方法可用于Gd-碳硼烷络合物的合成。六乙基酯7与碳硼烷基烯丙基碳酸酯13a的反应在Pd(dba)2 / 2dppe催化剂(10 mol%)在THF中于50°C进行得非常顺利,从而形成了C–C键形成产物14收率74%。用LiOH在甲醇水溶液中在14中水解乙酯,然后用稀盐酸(1N)处理,以68%的收率得到相应的五酸15。用六水合氯化((III)处理含有DTPA衍生物15的碳硼烷,可以定量获得所需的Gd-DTPA碳硼烷络合物16。