Some new polyfluorinated 1,3,4-oxadiazoles have been obtained via a two-step method. The cycloadditions of the 1,3,4-oxadiazoles have been studied and an analysis of the energies of the frontier orbitals calculated by the MNDO method indicates a LUMO-dependent pathway for cycloaddition.
DOI:
10.1016/s0022-1139(00)80860-x
作为产物:
描述:
1-(N-methyltrifluoroacetimidoyl)-2-(trifluoroacetyl)hydrazine, complex with methanol 以
甲醇 为溶剂,
反应 12.0h,
以54%的产率得到3,5-双(三氟甲基)-4-甲基-4H-1,2,4-三唑
参考文献:
名称:
Reitz, David B.; Finkes, Michael J., Journal of Heterocyclic Chemistry, 1989, vol. 26, p. 225 - 230
Unsaturated nitrogen compounds containing fluorine. Part 16. The synthesis of 3,5-bis(trifluoromethyl)-1H-1,2,4-triazole and some 4-substituted derivatives from 2,5-dichloro-1,1,1,6,6,6-hexafluoro-3,4-diazahexa-2,4-diene
作者:Mohamad M. Abdul-Ghani、Anthony E. Tipping
DOI:10.1016/0022-1139(94)03199-a
日期:1995.5
The dichloroazine 5 has been converted into the monoaminoazines CF3C(NHR)=NN=CClCF3 (6) [a, R = Ph (89%); b, R = H (81%); c, R = Me (89%); d, R = CH2CO2Me (96%); e, R = CH2CO2Et (95%)] and the diaminoazines CF3C(NHR) = NN = C(NHR)CF3 (4) [c, R = H (96%); d, R = Me (94%); e, R = CH2CO2Me (50%); f, R = CH2CO2Et (77%)] by reaction with ammonia or the appropriate primary amino compound; with hydroxylamine
二氯嗪5已经转化为单氨基嗪CF 3 C(NHR)= NN = CClCF 3(6)[a,R = Ph(89%); n = 1。b,R = H(81%);c,R = Me(89%);d,R = CH 2 CO 2 Me(96%);e,R = CH 2 CO 2 Et(95%)]和二氨基嗪CF 3 C(NHR)= NN = C(NHR)CF 3(4)[c,R = H(96%);e,R =H(96%)。d,R = Me(94%);e,R = CH 2 CO 2 Me(50%);f,R = CH 2 CO 2 Et(77%)]与氨或适当的伯氨基化合物反应;与羟胺的合成-肟CF 3 CCl = NNHC(CF 3)=生成NOH(8)(86%)。混合的二氨基嗪CF 3 C(NHR)= NN = C(NHR')CF 3(4)[g,R = H,R'= Ph; h,R'= Me,R'= H;i,R = Me,R′=
Reitz, David B.; Finkes, Michael J., Journal of Heterocyclic Chemistry, 1989, vol. 26, p. 225 - 230
Some new polyfluorinated 1,3,4-oxadiazoles have been obtained via a two-step method. The cycloadditions of the 1,3,4-oxadiazoles have been studied and an analysis of the energies of the frontier orbitals calculated by the MNDO method indicates a LUMO-dependent pathway for cycloaddition.