Reaction of N-sulfonyl-1,4-benzoquinone imines with enamines
作者:S. A. Konovalova、A. P. Avdeenko、V. V. Pirozhenko、A. L. Yusina、G. V. Palamarchuk、S. V. Shishkina
DOI:10.1134/s1070428017040054
日期:2017.4
4-benzoquinone imine reacted with enamines to give 1,4-addition products and products of their subsequent cyclization, substituted 5-aminobenzofurans and 5-aminoindoles, depending on the solvent nature, electron-withdrawing power of the substituent on the quinone imine nitrogen atom, and enamine structure. The presence of strong electron-withdrawing trifluoromethanesulfonyl group on the quinone imine nitrogen
Highly enantioselective [3+2] annulation of 4-amino-isoxazoles with quinone monoimines to access structurally diverse isoxazoline fused dihydrobenzofurans and antifungal evaluation
The first catalytic enantioselective [3+2] cyclization between 4-amino-isoxazoles and quinonemonoimines was achieved by using a chiralphosphoricacid catalyst. This transformation afforded a series of isoxazoline fused dihydrobenzofuran derivatives with two sequential chiral centers in high yields and outstanding enantioselectivities. The absolute configuration of the title compounds was determined