The α-acetyl ketene dithioacetals 2, which bear various alkylthio groups, are a kind of important intermediates in organic synthesis. In this paper, dithioacetals 2 were prepared in very high yields (90%—100%) via t...
The 4 aryl 3,5 bis(methoxycarbonyl) 2 isoxazoline N oxides(nitrones)(a) in anhydrous DMF was refluxed for 3-4 hours and ten of 4 aryl 3,5 bis(methoxycarbonyl) 2 isoxazoles(b) were given with good yields(43%-81%) via t...
Based on the one carbon unit transfer reaction of tetrahydrofolate coenzymes, hydratropic aldehyde was synthesized successfully by using benzimidazolium salt as tetrahydrofolate coenzyme model at formic acid oxidation...
Two new methods for synthesis of 4β-amino-4-deoxypodophyllotoxin and 4β-amino-4-demethyl-4-deoxypodophyllotoxin have been developed. These compounds were synthesized by reduction of the corresponding 4β-anzido-po...