Palladium-catalysed synthesis of α-diallylated ketosulphides of benzothiazole and their transformation into diallyl thiiranes and trienes
摘要:
alpha-Ketosulphides of benzothiazole 1 react with allylic carbonates in the presence of palladium acetate in dichloromethane under mild conditions affording alpha,alpha-diallylated ketosulphides 2 in high yields. Reduction of 2 with sodium borohydride in isopropanol gives episulphides which in turn can be transformed almost quantitatively into trienes.
Palladium-catalysed synthesis of α-diallylated ketosulphides of benzothiazole and their transformation into diallyl thiiranes and trienes
摘要:
alpha-Ketosulphides of benzothiazole 1 react with allylic carbonates in the presence of palladium acetate in dichloromethane under mild conditions affording alpha,alpha-diallylated ketosulphides 2 in high yields. Reduction of 2 with sodium borohydride in isopropanol gives episulphides which in turn can be transformed almost quantitatively into trienes.