A convenient method for the asymmetric synthesis of 1-amino-alkylphosphonic acids was described.It involved the diastereoselctivealkylation of bicyclic chlorome
Methyl- and Ethyl- vinyl sulfoxides (MVSO and EVSO) were first synthesized from common organic reagents, i.e. sulfate, thiourea and ethylene oxide in excellent yi
(±)Lespedezaflavanone D,8,5’-di(γ,γ-dimethylallyl)-5,7,2’,4’-tetrahydroxyflavanone,hasbeen synthesized by the condensation of 4,6-dimethoxymethoxy-3-(
Carboxymethylpachyman(Ⅰ)was formed by carboxymethylation ofβ-pachyman.The antitumour activity of carboxymethylpachyman(Ⅰ)against S<sub>180</sub>、EAC、MA、U<sub>
A key intermediate of cembranolides--(E,E,E,E)- 2,6,10,14-tetramethyl- 8-benzenesulfonyl- 2,6,10,14- tetraen-1,16-hexadecadiol was synthesized from geraniol and