Preparation and properties of novel trisubstituted N-nitrosoureas which decompose to afford triazenes and nitro compounds under mild conditions.
作者:SHOKO SUEYOSHI、MASAYUKI TANNO
DOI:10.1248/cpb.33.488
日期:——
3, 3-Diethyl-(IIa, b) and 3-methyl-3-(3-pyridylmethyl)-1-nitroso-1-tolylureas (IIc, d) were prepared from the corresponding ureas (Ia-d). 3, 3-Dialkyl-1-(2-tolyl) nitrosoureas (IIa, c) decomposed to produce 3, 3-dialkyl-1-(2-tolyl) triazenes (IIIa, c) at room temperature. On the other hand, 3, 3-dialkyl-1-(4-tolyl) ureas (IIb, d) gave mainly the corresponding triazenes (IIIb, d) in protic solvents, although IIb, d gave 3, 3-dialkyl-1-(2-nitro-4-tolyl) ureas (IVb, d) and the denitrosated products (Ib, d) in chloroform or carbon tetrachloride.
由相应的脲类(Ia-d)制备出 3,3-二乙基-(IIa,b)和 3-甲基-3-(3-吡啶基甲基)-1-亚硝基-1-甲基脲(IIc,d)。3,3-二烷基-1-(2-甲苯基)亚硝基脲(IIa,c)在室温下分解生成 3,3-二烷基-1-(2-甲苯基)三氮烯(IIIa,c)。另一方面,3, 3-二烷基-1-(4-甲苯基)脲(IIb,d)在质子溶剂中主要生成相应的三嗪(IIIb,d),尽管 IIb,d 在氯仿或四氯化碳中生成 3, 3-二烷基-1-(2-硝基-4-甲苯基)脲(IVb,d)和脱硝产物(Ib,d)。