Synthetic Studies on the Bryostatins: Preparation of a Truncated BC-Ring Intermediate by Pyran Annulation
作者:Gary E. Keck、Anh P. Truong
DOI:10.1021/ol050511w
日期:2005.5.1
[reaction: see text]. A synthesis of a potential BC-ring subunit (C9-C27) for bryostatin 1, a remarkably potent anticancer agent, has been developed in 16 steps and 18% overall yield. The key features of this route include a BITIP-catalyzed asymmetric allylation reaction, chelation-controlled allylations, a hydroformylation reaction, and a pyran annulation reaction.
[反应:请参见文字]。已经以16个步骤开发了bryostatin 1(一种非常有效的抗癌药)的潜在BC环亚基(C9-C27)的合成,总产率为18%。该途径的关键特征包括BITIP催化的不对称烯丙基化反应,螯合控制的烯丙基化,加氢甲酰化反应和吡喃环化反应。