Processes are disclosed for preparing 3-hydroxymethylcyclopentanone compounds, which are useful as intermediates in the preparation of HIV chemokine CCR-5 receptor antagonists. A process is described in which the compounds are prepared by opening the cyclopropyl ring of a (1-alkoxycarbonyl-2-oxo)-trans-bicyclo[3.1.0]hexane compound by addition of a nucleophile to the cyclopropyl ring, and then decarboxylating the resulting 2-alkoxycarbonyl-3-(Nu-methyl)-cyclopentanone (Nu=the added nucleophilic group) via base solvolysis. Also described is a process for preparing the bicyclo[3.1.0]hexane precursors by the catalyzed cyclopropanation of a suitable alpha-diazo-beta-ketoester. The preparation of the alpha-diazo-beta-ketoesters and precursors thereto are also disclosed.
本文介绍了制备3-羟甲基
环戊酮化合物的方法,这些化合物在制备HIV
趋化因子CCR-5受体拮抗剂中作为中间体非常有用。其中一种方法是通过将核试剂加到环丙基环的(1-烷氧羰基-2-氧代)-反式双环[3.1.0]己烷化合物上,打开环丙基环,然后通过碱溶解解羧基化反应,将产生的2-烷氧羰基-3-(Nu-甲基)-
环戊酮(Nu为添加的核试剂基团)脱羧而制备。此外,还介绍了通过催化的α-重氮基-β-
酮酸酯
环丙烷化反应制备双环[3.1.0]己烷前体的方法。同时也揭示了α-重氮基-β-
酮酸酯和其前体的制备方法。