Synthesis of a 6-azaspiro[4.5]decane related to halichlorine and the pinnaic acids
作者:Derrick L.J. Clive、Vince S.C. Yeh
DOI:10.1016/s0040-4039(99)01815-8
日期:1999.12
Sulfone 15, derived from d-glutamic acid, and aldehyde 23, made by diastereoselective alkylation, were linked and elaborated into enamine sulfone 33. This underwent 5-exo radical cyclization to 34, which was desulfonylated to (−)-35, a compound that represents the spirobicyclic core of halichlorine.