The sequential oxidation-Horner-Wadsworth-Emmons reaction of alcohols to prepare α-halo-α, β-unsaturated esters (halo =F, Cl) with middle to excellent (Z)-se
A new aromatic dianhydride monomer containing pyridine moiety, 2,6-bis[4’-(3’’,4’’- dicarboxyphenoxy)benzoyl]-pyridine dianhydride (Md), was synthesized in
The synthesis of four analogs of philanthotoxin is described. The preliminary bioassay showed that these compounds all had good insecticidal activities,and the