New, Abridged Pathway to Masamune's “Southern Hemisphere” Intermediate for the Total Synthesis of Bryostatin 7
作者:Karl J. Hale、Mark Frigerio、Soraya Manaviazar
DOI:10.1021/ol027393m
日期:2003.2.1
see text] The "Southern Hemisphere" intermediate 2, used by Masamune and co-workers for their asymmetric total synthesis of bryostatin 7 (1), has been synthesized from (E)-1,4-hexadiene (11) by a 24-step pathway that has a longest linear sequence of only 20 steps. This is the shortest synthesis of 2 so far recorded, and moreover, it is fully stereocontrolled.
[反应:参见文本] Masamune及其同事用于不对称总合成抑菌素7(1)的“南半球”中间体2是由(E)-1,4-己二烯(11)合成的,具有最长线性序列(仅20个步骤)的24个步骤的路径。这是迄今为止录制的2的最短合成,而且它是完全立体声控制的。