Synthesis of 1-Aryl-1,4,5,6-tetrahydro-pyrimidines and 1-Aryl-3-substituted 1,4,5,6-Tetrahydropyrimidinium Salts
作者:Isabel Perillo、Liliana R. Orelli、María B. García、Isabel A. Perillo
DOI:10.3987/com-00-9018
日期:——
3-propanediamines (5) with trimethylsilyl polyphosphate (PPSE). Quaternization of compounds (1) with methyl (or ethyl) iodide led to the corresponding cyclic amidinium salts (2), while treatment of compound (1a) with 2,4-dinitrochlorobenzene yielded an open chain product resulting from hydrolysis of the salt. An alternative method was employed for the synthesis of 1-aryl-1,4,5,6-tetrahydropyrimidinium salts bearing
描述了一种合成 1-芳基-1,4,5,6-四氢嘧啶 (1) 的方法,通过 N-芳基-N'-甲酰基-1,3-丙二胺 (5) 与三甲基甲硅烷基多磷酸盐 (PPSE) 的闭环. 用甲基(或乙基)碘对化合物(1)进行季铵化得到相应的环状脒盐(2),而用2,4-二硝基氯苯处理化合物(1a)得到由盐水解产生的开链产物。另一种方法用于合成在 N3 上带有支链烷基或芳基取代基的 1-芳基-1,4,5,6-四氢嘧啶盐,不能通过烷基化获得。通过相应的六氢嘧啶 (3) 的脱氢以高产率获得此类化合物。讨论了这两个程序的范围和限制。