Site-Selective Defluorinative sp<sup>3</sup> C–H Alkylation of Secondary Amides
作者:Wen-Jun Yue、Craig S. Day、Ruben Martin
DOI:10.1021/jacs.1c03126
日期:2021.5.5
Oxidative Amide Coupling from Functionally Diverse Alcohols and Amines Using Aerobic Copper/Nitroxyl Catalysis
作者:Paige E. Piszel、Aristidis Vasilopoulos、Shannon S. Stahl
DOI:10.1002/anie.201906130
日期:2019.8.26
The aerobic Cu/ABNO catalyzed oxidative coupling of alcohols and amines is highlighted in the synthesis of amide bonds in diverse drug-like molecules (ABNO=9-azabicyclo[3.3.1]nonane N-oxyl). The robust method leverages the privileged reactivity of alcohols bearing electronegative hetero- atoms (O, F, N, Cl) in the β-position. The reaction tolerates over 20 unique functional groups and 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]。