Total Synthesis of (+)-Erogorgiaene Using Lithiation–Borylation Methodology, and Stereoselective Synthesis of Each of Its Diastereoisomers
作者:Tim G. Elford、Stefan Nave、Ravindra P. Sonawane、Varinder K. Aggarwal
DOI:10.1021/ja207869f
日期:2011.10.26
A short (8 steps) synthesis of (+)-erogorgiaene in 44% overall yield from p-methylacetophenone is described. Key steps include lithiation/borylation-protodeboronation to build up the molecule and control the stereochemistry at C1 and C4. The C11 stereochemistry was similarly set up by using lithiation/borylation methodology. The use of a mixed, unhindered borane in the lithiation/borylation reaction
Benzothiazines in Synthesis: Studies Directed toward the Synthesis of Erogorgiaene
作者:Michael Harmata、Xuechuan Hong、Peter R. Schreiner
DOI:10.1021/jo701935s
日期:2008.2.1
The use of benzothiazenes for the formal total synthesis of erogorgiaene and stereoselective total syntheses of two diastereomers of this natural product is described. In particular, the stereochemical course of a radical cyclization anticipated to give the correct relative stereochemistry for the synthesis of erogorgiaene is discussed utilizing both experimental and computational data.