Synthesis of N,N-bis(silyloxy)enamines with a functionalized double bond
作者:Alexander D. Dilman、Alexander A. Tishkov、Il’ya M. Lyapkalo、Sema L. Ioffe、Vadim V. Kachala、Yury A. Strelenko、Vladimir A. Tartakovsky
DOI:10.1039/b004268o
日期:——
The general method for the double silylation of α- or β-functionalized
aliphatic nitro compounds 1 leading
to regio- and stereoselective formation of N,N-bis(silyloxy)enamines 3 with a functionalized double bond is elaborated.
The configuration of obtained products is determined by NMR spectroscopy.
Structure and Stereodynamics of <i>N</i>,<i>N</i>-Bis(silyloxy)enamines
作者:Alexander A. Tishkov、Alexander D. Dilman、Valery I. Faustov、Arsenij A. Birukov、Konstantin S. Lysenko、Paul A. Belyakov、Sema L. Ioffe、Yury A. Strelenko、Michael Yu. Antipin
DOI:10.1021/ja026548i
日期:2002.9.1
The structure and stereodynamics of N,N-bis(silyloxy)enamines (1), a new class of enamines with extraordinary reactivity, have been simulated by the DFT PBE/TZP method. The computed pattern of dynamic behavior and structural peculiarities of 1 was shown to reflect adequately the results of the studies by a series of physical methods including X-ray analysis and dynamic NMR and UV spectroscopies, which provided evidence of a rather low barrier for rotation around the C,N single bond, a negligible contribution of the n-pi-conjugation, a high barrier of inversion, and high pyramidality of the nitrogen atom.