critical for assembly of the A and F rings of penitrem D. We also explored simultaneous execution of this tactic with concurrent construction of ring I. Reinvestigation of a model system provided an explanation for the unanticipated stereochemical outcome at C(28).
[公式:参见文字]在这封信中,我们展示了高度立体选择性的串联曼尼希环化-
克胺片段化/加成级联的可行性,这对于组装阴茎膜D的A和F环至关重要。我们还探索了同时执行该策略的可行性环I的构建。对模型系统的重新研究为C(28)的意外立体
化学结果提供了解释。