Sulfonamides are efficiently condensed with aldehydes as well as ketones in the absence of catalyst in 1-butyl-3-methylimidazolium bromide ([bmim]Br) under microwave irradiation to afford N-sulfonyl aldimines and ketimines in good to excellent yields in short reaction times.
NADDAKA, V. I.;AVANESYAN, K. V.;CHERKINSKAYA, M. L.;MINKIN, V. I., ZH. ORGAN. XIMII, 24,(1988) N 6, 1282-1284
作者:NADDAKA, V. I.、AVANESYAN, K. V.、CHERKINSKAYA, M. L.、MINKIN, V. I.
DOI:——
日期:——
ZIEGLER E.; RUEF W., Z. NATURFORSCH. <ZENB-AX>, 1975, 30B, NO 11-12, 946-950
作者:ZIEGLER E.、 RUEF W.
DOI:——
日期:——
Triarylmethyl chlorides as novel, efficient, and mild organic catalysts for the synthesis of <i>N</i>-sulfonyl imines under neutral conditions
A highly efficient procedure for the preparation of N-sulfonylimines via condensation of sulfonamides with aldehydes as well as ketones in the presence of triarylmethyl chlorides as metal-free organo-catalysts at 40 °C is described. The advantages of this class of catalysts over the reported ones are their efficiency and possibility of running reactions in neutral media that makes them suitable for