A mild and efficient synthetic route to the iboga scaffold by employing reductive-Heck type annulation is described. The utility of this process is demonstrated by the direct access to the ibogamine, epiibogamine and iboga-analogs. The cyclization precursors were readily obtained from 2-iodoaniline by heteroannulation reaction with suitable alkynes followed by iodination.
描述了通过采用还原性-Heck型环化法制备iboga支架的温和而有效的合成途径。该方法的实用性通过直接接触伊布巴明,表异巴胺和依博加类似物得到证明。通过与合适的
炔烃进行异环反应,然后进行
碘化,可以容易地从
2-碘苯胺获得环化前体。