Synthetic studies toward bryostatin 1: preparation of a C1–C16 fragment by pyran annulation
作者:Gary E. Keck、Dennie S. Welch、Yam B. Poudel
DOI:10.1016/j.tetlet.2006.09.094
日期:2006.11
An expeditious assembly of a C(1)-C(16) subunit of bryostatin 1 is described. A pyran annulation reaction was utilized to form the B-ring by reaction of a hydroxy-allylsilane with a fully elaborated A-ring subunit. This annulation process proceeded with complete diastereoselectivity and in excellent isolated yield despite the presence of potentially sensitive functionality in the A-ring segment.
描述了一个快速组装的bryostatin 1的C(1)-C(16)亚基。利用吡喃环化反应通过羟基烯丙基硅烷与充分加工的A环亚基的反应形成B环。尽管在A环段中存在潜在的敏感功能,但这种成环过程仍以完全的非对映选择性和出色的分离收率进行。