已经化学合成了一系列的1芳基2,2,2,三氟乙酮,后来研究了使用立体互补醇脱氢酶(ADHs)的生物还原作用。令人满意的是,使用Ralstonia物种的ADH和红球菌的ADH以高转化率和选择性获得了(R)-醇,而(S)-对映体是使用短乳杆菌的ADH独立生产的。以及市售的evo-1.1.200。在寻找朝向Odanacatib(一种组织蛋白酶K的口服生物利用性和选择性抑制剂)的立体选择性途径时,开发了一种顺序方法学,该方法结合了钯催化的1-(4-溴苯基)-2,2,2-三氟乙酮之间的交叉偶联和4-(甲基磺酰基)苯基硼酸在水性介质中的生物还原生成的2,2,2-三氟-1-(4'-(甲基磺酰基)-[1,1'-联苯] -4-基)乙酮具有被广泛研究。最后,以对映体纯的形式获得了所需的(R)-2,2,2-三氟-1-(4'-(甲基磺酰基)-[1,1'-联苯] -4-基)乙醇,产率为85%依序采用128 g L -1
A Practical Enantioselective Synthesis of Odanacatib, a Potent Cathepsin K Inhibitor, via Triflate Displacement of an α-Trifluoromethylbenzyl Triflate
作者:Paul D. O’Shea、Cheng-yi Chen、Danny Gauvreau、Francis Gosselin、Greg Hughes、Christian Nadeau、Ralph P. Volante
DOI:10.1021/jo8020314
日期:2009.2.20
An enantioselective synthesis of the Cathepsin K inhibitor odanacatib (MK-0822) 1 is described. The key step involves the novel stereospecific S(N)2 triflate displacement of a chiral alpha-trifluoromethylbenzyl triflate 9a with (S)-gamma-fluoroleucine ethyl ester 3 to generate the required alpha-trifluoromethylbenzyl amino stereocenter. ne triflate displacement is achieved in high yield (95%) and minimal loss of stereochemistry. The overall synthesis of I is completed in 6 steps in 61% overall yield.
Combined batch and continuous flow procedure to the chemo-enzymatic synthesis of biaryl moiety of Odanacatib
作者:Raquel de Oliveira Lopes、Amanda S. de Miranda、Benedikt Reichart、Toma Glasnov、C. Oliver Kappe、Robert C. Simon、Wolfgang Kroutil、Leandro S.M. Miranda、Ivana C.R. Leal、Rodrigo O.M.A. de Souza
DOI:10.1016/j.molcatb.2014.03.017
日期:2014.6
The development of chemo-enzymatic reaction under continuous flow conditions is an emerging area where biotechnology and organic chemistry can joint efforts in order to develop better process. Here in we report our effort on the development of a continuous flow approach to the synthesis of Odanacatib intermediate using a combined batch and continuous flow apparatus arriving on the desired molecule in excellent yields and selectivity. (C) 2014 Elsevier B.V. All rights reserved.