Synthesis of the Cyclohexane Core of Phomactins and a New Route to the Bicyclo[9.3.1]pentadecane Diterpenoid Skeleton
摘要:
Conjugate reduction of an enone accompanied by in situ intramolecular aldol condensation was used to construct the tetrasubstituted cyclohexane nucleus of phomactins. Subsequent relay ring-closing metathesis completed the nine-membered ansa bridge of the diterpenoid framework.
Synthesis of the Cyclohexane Core of Phomactins and a New Route to the Bicyclo[9.3.1]pentadecane Diterpenoid Skeleton
摘要:
Conjugate reduction of an enone accompanied by in situ intramolecular aldol condensation was used to construct the tetrasubstituted cyclohexane nucleus of phomactins. Subsequent relay ring-closing metathesis completed the nine-membered ansa bridge of the diterpenoid framework.
Catalytic Generation of Activated Carboxylates: Direct, Stereoselective Synthesis of β-Hydroxyesters from Epoxyaldehydes
作者:Kenneth Yu-Kin Chow、Jeffrey W. Bode
DOI:10.1021/ja047407e
日期:2004.7.1
The catalytic generation of activated carboxylates from epoxyaldehydes enables the direct, stereoselective synthesis of beta-hydroxyesters under mild, convenient reaction conditions. In addition to providing a new method for the synthesis of anti-aldol adducts, this chemistry unveils a mechanistically viable solution to the catalytic, waste-free synthesis of esters.