Preparation of cis-4-O-protected-2-cyclopentenol derivatives
申请人:Hoechst Marion Roussel Inc.
公开号:US05728899A1
公开(公告)日:1998-03-17
The present invention relates to a novel process for preparing cis-4-O-protected-substituted-2-cyclopentenol derivatives comprising, a) dissolving a 4-O-protected-2-cyclopentenone in a suitable organic solvent; and b) treating the solution with a suitable Lewis acid and a suitable reducing agent at a temperature of from about -100.degree. C. to about 20.degree. C. The cis-4-O-protected-substituted-2-cyclopentenol derivatives are useful intermediates in the preparation of various cyclopentanyl and cyclopentenyl purine analogs which are useful as immunosuppressants and in the preparation of various prostaglandins.
One-pot Annulation of Enones with Lithiated Allyl Phenyl Sulfone
作者:Zemin Dong、Stephen Pyne、Brian Skelton、Allan White
DOI:10.1055/s-1997-685
日期:——
A one-pot method of converting five and six membered cyclic enones to their respective bicyclo[2.2.1]heptanones and bicyclo[2.2.2]octanones, respectively, and acyclic enones to cyclohe-3-enols is reported.