Synthesis and rearrangements of N-trichloroacetylfluoroacetimidoyl chloride and its phosphorylation products
作者:Yuliya V Rassukana、Kateryna O Davydova、Petro P Onys’ko、Anatolii D Sinitsa
DOI:10.1016/s0022-1139(02)00160-4
日期:2002.10
The interaction of N-fluoroacetyltrichloroacetamide (1) with PCl5 leads to the formation of N-trichloroacetylfluoroacetimidoyl chloride (3), which is irreversibly isomerized to N-chloro(fluoro)vinyltrichloroacetamide (Z/E≈3:1) in the presence of the catalyst DBU. In the reaction of 3 with phosphites or phosphines, the substitution of chlorine atom by the phosphorus-containing groups is accompanied
N-氟乙酰基三氯乙酰胺(1)与PCl 5的相互作用导致N-三氯乙酰基氟乙酰亚胺基氯(3)的形成,在存在下,N-三氯乙酰基氟乙酰亚胺基氯(Z / E≈3:1)不可逆地异构化为N-氯(氟)乙烯基三氯乙酰胺(Z / E≈3:1)。催化剂DBU。在反应3与亚磷酸酯或膦,氯原子的由含磷基团的取代伴有立体选择性1,3- H传输,得到C-磷酸fluorovinylamides(6,9),这主要与È-配置。对于低亲核性亚磷酸酯,可以实现[4 + 1]-环加成,而对于氢磷酰基试剂,可以实现CN键的1,2-加成。