Novel cycloaddition products from the reaction of 2,5-dichloro-1,1,1,6,6,6-hexafluoro-3,4-diazahexa-2,4-diene with cycloalkenes, cyclodienes and cycloheptatriene, and of hexafuoroacetone azine with cycloheptatriene
作者:Mohamad Abdul-Ghani、Anthony E. Tipping
DOI:10.1016/s0022-1139(00)80391-7
日期:1993.7
chromatographic separation from the 2,3-dihydropyran reaction are the 5,6-dihydropyran-3-yl azine (5), the hydrazone CH2(CH2)2OCHCC(CF3)NNH2 (8) and quimolar quantities of 5,6-dihydropyran-3-yl trifluoromethyl ketone (6) and the chlorohydrazone O(CH2)4CHNHNCClCF3 (7) possibly arising via hydrolysis of the 1:2 adduct (16). The reaction of azine 2 with cycloheptatriene at 70 °C gives a complex mixture, in which
二氯嗪CF 3 CCl =NN= CClCF 3(2)与环戊烯(在CH 2 Cl 2溶剂中),环庚烯,茚、,、 2,3-二氢呋喃,2的热反应(20–70°C)3-二氢吡喃,降冰片二烯,环戊二烯和二环戊二烯在每种情况下均以包含CF 3 CCl 2基团的重排的[3 + 2]环加合物(3)为主要产物。水解(CF 3 CCl 2 →CF 3 CO)以得到酰胺(4),尝试在硅胶上进行色谱纯化。与环戊烯一起重排的环戊二烯[3 + 2]环加合物(图3b)也形成,而通过从2,3-二氢吡喃反应色谱分离得到的其它产物的5,6-二氢吡喃-3-基吖嗪(5),腙CH 2(CH 2)2 OCHC C(CF 3)NNH 2(8)和quimolar量的5,6-二氢吡喃-3-基三氟甲基酮(6)和所述chlorohydrazone O(CH 2)4 CHNHNCClCF 3(7),通过水解而产生可能1:2加合物(1