A convenient chemo-enzymatic synthesis and 18F-labelling of both enantiomers of trans-1-toluenesulfonyloxymethyl-2-fluoromethyl-cyclopropane
作者:Patrick Johannes Riss、Frank Rösch
DOI:10.1039/b812777h
日期:——
C4-building blocks for medicinal chemistry. The enzymatic kinetic resolution based synthesis of 1 and ent-1 utilises inexpensive, commercially available starting materials. It is based on enantiomeric resolution of rac-cyclopropane carboxylic esters using esterase from Streptomyces diastatochromogenes. Both enantiomers of 1 were prepared selectively in high overall yield over nine steps, starting from
本报告涉及一种立体选择性的,可靠的途径来合成反式1,2-二取代的环丙烷,尤其是合成到(S,S)-1-甲苯磺酰氧基甲基-2-氟甲基-环丙烷(1)和(R,R)-1 -甲苯磺酰氧基甲基-2-氟甲基-环丙烷(ent-1)是构象受限的,末端氟化的C4结构单元,用于药物化学。1和ent-1的基于酶动力学拆分的合成利用了廉价的市售起始原料。它基于使用产自链霉菌产色链霉菌的酯酶对rac-环丙烷羧酸酯进行对映异构体拆分的结果。从丙烯酸乙酯开始,在9个步骤中以较高的总收率选择性制备了两种1的对映体。还报道了[18F] -1和[18F] -ent-1的成功放射合成。