A convenient synthetic approach to previously unknown N-H imidoyl phosphonates, based on addition of dialkyl phosphites to trifluoroacetonitrile, has been developed. The synthetic potential of such imines, which exist as equilibrium mixtures of E/Z-isomers, was demonstrated by their easy reduction and functionalization with O- and P-centered nucleophiles, to afford derivatives of α-aminophosphonic acids containing a trifluoromethyl group. Furthermore, interaction with mercaptoacetic acid proceeds with intramolecular cyclization of the intermediate adduct to produce a novel 2-phosphorylated N-H thiazolidone. Interaction between the N-H imines and trichloroacetylisocyanate leads to novel, reactive, phosphorylated N-acylated imines.
Synthesis of polyfluoroalkylated α-Aminophosphonic/thiophosphonic acids derivatives
作者:Petro P. Onys’ko、Kateryna A. Zamulko、Olena I. Kyselyova、Ivanna P. Yelenich、Yuliya V. Rassukana
DOI:10.1016/j.jfluchem.2016.03.014
日期:2016.5
Convenient synthetic approaches for previously unknown α-aminotetrafluoropropylphosphonic/thiophosphonic acidsderivatives were developed based on readily accessible N-(α-hydroxytetrafluoropropyl)carbamates. Synthesis of analogs of marketed anticancer agent Fotemustine bearing polyfluoroalkyl group instead of methyl substituent, has been performed.
Sigmatropic isomerizations in azaallyl systems: XXI. Alkanimidoylphosphonates and their prototropic and phosphorotropic isomers
作者:P. P. Onys’ko、T. V. Kim、E. I. Kiseleva、A. D. Sinitsa
DOI:10.1007/s11176-005-0110-8
日期:2004.12
Synthetic procedures for alkanimidoylphosphoryl derivatives with α-hydrogen atoms in the N-alkyl radical are developed. Data on the effect of substituents at the carbon and phosphorus atoms on the facility of prototropic transitions in the C=N-C triad are summarized. The most facile proton transfer occurs in the N-benzyl derivatives, and the prototropic isomer is the more stable, the stronger the electron-acceptor power of the substituent at the sp 3-carbon atom of the azaallyl triad. The proton transfer in N-(α-phenethyl)-trifluoroacetimidoylphosphonates proceeds selectively, which allows preparation of enantiomerically enriched derivatives of α-aminotrifluoroethylphosphonic acid. A specific effect of substituents at the phosphorus atom on the prototropism attendant on phosphorylation of imidoyl chlorides is demonstrated.
Sigmatropic Isomerizations in Azaallyl Systems: XXII. 1,3-Proton Transfer in (N-Alkyltrifluoroacetimidoyl)phosphonates
作者:P. P. Onys'ko、T. V. Kim、E. I. Kiseleva、Yu. M. Pustovit、A. D. Sinitsa
DOI:10.1007/s11176-005-0395-7
日期:2005.8
The reaction of N -alkyltrifluoroacetimidoyl chlorides with trialkyl phosphites leads to corresponding imidoylphosphonates CF3C[P(O)(OAlk)2]=NCH2R. These compounds undergo irreversible 1,3-H shift catalyzed by nitrogenous bases to give phosphorylated imines CF3CH[P(O)(OAlk)2]N=CHR. The tendency for prototropism increases with increasing electronegativity of substituents R: CF3 > CH2OMe > H > Me. N
的反应 Ñ -alkyltrifluoroacetimidoyl氯化物与三烷基亚磷酸酯通向相应imidoylphosphonates CF 3 C [P(O)(OAlk)2 ] = NCH 2 R.这些化合物经历由含氮碱基催化不可逆的1,3--H移位,得到磷酸化的亚胺CF 3 CH [P(O)(OAlk)2 ] N = CHR。随着取代基R:CF 3 > CH 2 OMe> H> Me的电负性的增加,原质性的趋势增加。 所获得的化合物的 N- 环戊基类似物没有显示出质变倾向。酰亚胺基膦酸酯主要以 Z 异构体的形式存在[ Z / E〜 (6-10):1]。
Convenient synthesis of fluoroalkyl α- and β-aminophosphonates
作者:Gerd-Volker Röschenthaler、Valery P. Kukhar、Irene B. Kulik、Alexander E. Sorochinsky、Vadim A. Soloshonok
DOI:10.1016/j.jfluchem.2011.05.005
日期:2011.10
Addition of both alkyl phosphites and phosphonate α-carbanions to N-substituted aldimines derived from fluoroalkyl aldehydes presents a convenient method for synthesis of fluoroalkyl α- and β-aminophosphonates in good yield (55–86%) under mild conditions.