Asymmetric Desymmetrization of Prochiral 1,3-Diols via Diastereoselective C-O Bond Fission of Bicyclic Acetal Using a Chiral Sulfoxide as a Chiral Auxiliary.
Asymmetric Desymmetrization of Prochiral 1,3-Diols via Diastereoselective C-O Bond Fission of Bicyclic Acetal Using a Chiral Sulfoxide as a Chiral Auxiliary.
Asymmetric functionalisation of prochiral 1,3-diols based on an efficient 1,6-chiral induction: the diastereoselective C–O bond fission in chiral β-arylsulfinyl acetal via two types of chelation control
The novelasymmetric functionalisation of a prochiral 1,3-diol is accomplished by the diastereoselective C–O bond fission of the chiral β-arylsulfinyl acetalvia two types of chelation controlled transition states (A and C in Scheme 4).
[GRAPHICS](+/-)-Paeonilide, a novel monoterpenoid metabolite from the roots of Paeonia delavayi showing anti-platelet activating factor activity, is convergently synthesized in five steps with 59% overall yield. The application of benzoyl peroxide-promoted radical addition of unsaturated ester to aldehyde and subsequent topologically favored cyclization greatly simplified the synthesis.