A New Synthetic Approach to 1-[(3R,4R)-1-Cyclooctylmethyl-3-hydroxymethyl-4-piperidyl]-3-ethyl-1,3-dihydro-benzimidazol-2-one (J-113397), the first non-peptide ORL-1 receptor antagonist
作者:Carmela De Risi、Gian Piero Pollini、Claudio Trapella、Ilaria Peretto、Silvano Ronzoni、Giuseppe A.M. Giardina
DOI:10.1016/s0968-0896(01)00085-2
日期:2001.7
Dieckmann cyclization of the Michael adduct 8 of cyclooctylmethylamine to methyl acrylate, condensation with o-phenylendiamine produced the beta-enamino ester 2, which has been conveniently used to construct the benzimidazolone substituent at C-4. Catalytic hydrogenation of intermediate 11 followed by base-promoted cis--trans isomerization of the key compound 12 led to the formation of ester 13, which was
一种有效的方法来处理1-[((3R,4R)-1-环辛基甲基-3-羟甲基-4-哌啶基] -3-乙基-1,3-二氢苯并咪唑-2-酮(J-113397)1,第一个概述了文献中描述的非肽ORL-1受体拮抗剂。通过环辛基甲胺的迈克尔加成物8的Dieckmann环化成丙烯酸甲酯构造哌啶骨架后,与邻苯二胺缩合生成β-烯胺酯2,该酯已被方便地用于在C-4处构建苯并咪唑酮取代基。中间体11的催化加氢反应,然后通过碱促进的关键化合物12的顺式-反式异构化反应,导致形成酯13,该酯通过LiAlH(4)还原转化为外消旋标题化合物。