Unsaturated nitrogen compounds containing fluorine. Part 18. Novel cycloaddition products from the reaction of quadricyclane with fluorinated azines and the azomethine imide 2-hexafluoroisopropylidene-3-methyl-3-phenyl-5,5-bis(trifluoromethyl)tetrahydropyrazol-2-ium-1-ide
作者:Michael G. Barlow、Nadia N.E. Suliman、Anthony E. Tipping
DOI:10.1016/0022-1139(94)03183-z
日期:1995.5
2] 1:1 cycloadducts, i.e. the compounds 8c (65%) (formed by reaction involving the CF3CF=N grouping in 1c) and 8d (20%) (formed by reaction involving the CF3CCl = N grouping in 1c) and the compound 8e (88%), as a mixture of two isomers in the ratio 72:16, respectively. Treatment of 6 with the azomethine imide (CF3)2C=N+−N−C(CF3)2CH2⎴CMePh (7) at 70 °C in dichloromethane afforded the exo-1,3-dipolar 1:1
四环烷烃(6)与吖嗪CF的反应3的CCl = NN = CClCF 3在70℃下在二氯甲烷中(1a)中,得所期外- [2 + 2 + 2]环加成8A(70%),和意想不到的外切- 1,3-偶极环加合物3a,由未证实的途径形成,并作为水解化合物酰胺4a(19%)分离出来。6在70°C下与六氟丙酮嗪(CF 3)2 C = NN = C(CF 3)2(1b)的相应反应生成exo- [2 + 2 + 2]环加合物8b(54%), -[2 + 2 + 2] 2:1环加合物9b(8%),由8b与6和exo,exo进一步反应形成-2:2环加合物10(31%),是通过将嗪1b的1,3-偶极环加合到1:1加合物8b的烯烃双键上而得到的,以生成1:2加合物,即甲亚胺亚胺14,随后是非的1,3-偶极环加成反应的14与四环烷6形成对比。相反,6与嗪CF 3 CCl = NN = CFCF 3(1c)(在55°C)和CF