Synthesis of 5-Amino-4-(2-azacycloalkylidene)-2-phenyl-2,4-dihydro-3<i>H</i>-pyrazol-3-ones
作者:Konstantin Nazarenko、Sergey Bova、Vitaliy Polovinko、Andrey Tolmachev
DOI:10.1055/s-0028-1083183
日期:——
The reaction 5-amino-2-phenyl-3,4-dihydro-3H-pyrazol-3-one with activated lactams (lactim ethers, lactam acetals, and methylthioalkylidene iminium salts) was investigated. It occurs on the active methylene group of 5-amino-2-phenyl-3,4-dihydro-3H-pyrazol-3-one to furnish cyclic enamines, 5-amino-4-(2-azacycloalkylidene)-2-phenyl-2,4-dihydro-3H-pyrazol-3-ones and 5-amino-4-(1-methyl-2-azacycloalkylidene)-2-phenyl-2,4-dihydro-3H-pyrazol-3-ones.
研究了5-氨基-2-苯基-3,4-二氢-3H-吡唑-3-酮与活化的内酰胺(内酰胺醚、内酰胺缩醛和甲硫基烯亚胺盐)的反应。反应发生在5-氨基-2-苯基-3,4-二氢-3H-吡唑-3-酮的活性亚甲基上,生成环状烯胺、5-氨基-4-(2-氮杂环烷亚基)-2-苯基-2,4-二氢-3H-吡唑-3-酮和5-氨基-4-(1-甲基-2-氮杂环烷亚基)-2-苯基-2,4-二氢-3H-吡唑-3-酮。