Double Heck Route to a Dibenzoxepine and Convergent Suzuki Cross-Coupling Strategy for the Synthesis of an MR Antagonist
作者:Marvin M. Hansen、Neil J. Kallman、Thomas M. Koenig、Ryan J. Linder、Rachel N. Richey、John R. Rizzo、Jeffrey A. Ward、Hannah Yu、Tony Y. Zhang、David Mitchell
DOI:10.1021/acs.oprd.6b00368
日期:2017.2.17
convergent synthesis of MR antagonist LY2623091 was established. For synthesis convergence, a vinyl bromide geometric isomer and chiral alaninol derivative were required building blocks. Key to the synthesis route development is a stereoselective synthesis of the E-vinyl bromide via a sequential double Heck reaction, Suzuki–Miyaura cross-coupling of the vinyl bromide, a selective nitro reduction, and a
建立了MR拮抗剂LY2623091的实用中试植物聚合合成方法。对于合成收敛,需要乙烯基溴几何异构体和手性丙氨醇衍生物。合成路线发展的关键是通过顺序的双重Heck反应,乙烯基溴的Suzuki-Miyaura交叉偶联,选择性的硝基还原以及对尿素的高度敏感的氰酰胺水解,立体选择性地合成E-乙烯基溴。通过两组伸缩方法可以提高产量和加工效率,从而减少了制造时间并提高了纯度。