Simple Enantioselective Approach to Synthetic Limonoids
作者:Douglas C. Behenna、E. J. Corey
DOI:10.1021/ja802376g
日期:2008.5.1
enantioselective and short approach to the synthesis of limonoids has been applied successfully to the simplest limonoid, 2. The carbon atoms of the tetracyclic framework were assembled in a single operation from the acylsilane 3 and the acetylenic sulfone 4 to form the chiral epoxide 5. Successive cationic and free-radical cyclizations starting with 5 generated the tetracyclic intermediates 9a, which was transformed