The reactions of isatin. benzotriazole. and succinimide with formaldehyde and methylamine yield monoamines RCH2N(Me)CH2R and methylenediamines RCH2N(Me)CH2N(Me)CH2R. The use of ethylenediamine as the amino component affords N,N'-disubstituted imidazolidines, while the reactions with 3-aminopropan-1-ol give N-substituted tetrahydro-1,3-oxazines. RCH2NBu21 was obtained from succinimide. formaldehyde, and diisobutylamine. Nitrosative cleavage of the amines obtained was studied: it was shown that monoamines and methylenediamines give N-nitrosoamines RCH2N(NO)Me, which were structurally characterized by X-ray diffraction analysis, RCH2NBu21 affords diisobutylnitrosamine. while imidazolidines transform into dinitroso compounds RCH2N(NO)CH2CH2N(NO)CH2R.
Syntheses of perfluoroalkylated amines and diamines by reactions of perfluoroalkyl grignard reagents with N-(α-aminoalkyl)benzotriazoles
作者:Alan R. Katritzky、Zhongxing Zhang、Ming Qi
DOI:10.1016/s0040-4039(97)01640-7
日期:1997.10
The first syntheses of (α,α′-diperfluoroalkylated)diamines are reported together with a range of substituted α-perfluoroalkylated amines all prepared in good yields from benzotriazole derivatives and perfluoroalkyl Grignard reagents in the presence of BF3·Et2O. Primary amines are conveniently obtained from Pd-catalyzed hydrogenations.