Synthesis of 1-diethoxyphosphoryl-1-methylthio-thioacetamides and 1-methylthioethenethioamides. An unusual intramolecular α-desulfenylation of thioacetamides
摘要:
Addition of the lithiated alpha-phosphoryl sulfide 1-Li to alkyl or aryl isothiocyanates 4(a-f) and phenyl isocyanate 4g was found to afford 1-diethoxyphosphoryl-1-methylthio-thioacetamides 5(a-f) and -acetamide 5g, respectively. In the case of the reaction with the p-chlorophenyl isothiocyanate 4e, the alpha-desulfenylated product 6 was isolated and on the basis of P-31-NMR experiments a mechanism of its formation was proposed. The phosphonates 5(a-f), which exist in the thione form, were found to undergo the Homer-Wittig reaction with aromatic aldehydes affording 1-methylthioethenethioamides 14(a-f).
Synthesis of 1-diethoxyphosphoryl-1-methylthio-thioacetamides and 1-methylthioethenethioamides. An unusual intramolecular α-desulfenylation of thioacetamides
摘要:
Addition of the lithiated alpha-phosphoryl sulfide 1-Li to alkyl or aryl isothiocyanates 4(a-f) and phenyl isocyanate 4g was found to afford 1-diethoxyphosphoryl-1-methylthio-thioacetamides 5(a-f) and -acetamide 5g, respectively. In the case of the reaction with the p-chlorophenyl isothiocyanate 4e, the alpha-desulfenylated product 6 was isolated and on the basis of P-31-NMR experiments a mechanism of its formation was proposed. The phosphonates 5(a-f), which exist in the thione form, were found to undergo the Homer-Wittig reaction with aromatic aldehydes affording 1-methylthioethenethioamides 14(a-f).
Synthesis of 1-diethoxyphosphoryl-1-methylthio-thioacetamides and 1-methylthioethenethioamides. An unusual intramolecular α-desulfenylation of thioacetamides
作者:Piotr Bałczewski、Piotr P Graczyk、Wiesława Perlikowska、Marian Mikołajczyk
DOI:10.1016/s0040-4020(01)80207-6
日期:1993.1
Addition of the lithiated alpha-phosphoryl sulfide 1-Li to alkyl or aryl isothiocyanates 4(a-f) and phenyl isocyanate 4g was found to afford 1-diethoxyphosphoryl-1-methylthio-thioacetamides 5(a-f) and -acetamide 5g, respectively. In the case of the reaction with the p-chlorophenyl isothiocyanate 4e, the alpha-desulfenylated product 6 was isolated and on the basis of P-31-NMR experiments a mechanism of its formation was proposed. The phosphonates 5(a-f), which exist in the thione form, were found to undergo the Homer-Wittig reaction with aromatic aldehydes affording 1-methylthioethenethioamides 14(a-f).