α-Phenylthio-α, β-unsaturated esters 6 were synthesized by Witting reaction of 3, which were prepared by a phenylsulfenyllation-trans-ylidation reaction.
A new triterpene, 25-methylenecyclopholidonyl p-hydroxy-trans-cinnamate, was isolated from a orchid Pholidota yunnanensis. The structure elucidation and ^1H, ^1
A quantitative structure-property relationship (QSPR) was made for the prediction of the hyperpolarizabilities(β) ofpara-disubstituted benzenes with the nonlin
A 1-β-methylcarbapencm analogue 6 was synthcsized on polystyrene-dicthylsilane resin (PS-DES) using 2-azetidinone bearing with 2-oxazolidonc chiral auxiliary a