Morita−Baylis−Hillman Reaction and Cyclization of 1-(<i>p</i>-Toluenesulfonyl)-1,3-butadiene with Aldimines
作者:Thomas G. Back、Danica A. Rankic、Jovina M. Sorbetti、Jeremy E. Wulff
DOI:10.1021/ol050658n
日期:2005.6.1
underwent Morita-Baylis-Hillman reaction with 1-(p-toluenesulfonyl)-1,3-butadiene (3) in the presence of 3-hydroxyquinuclidine (HQD) to afford adducts 4. The E-isomers of the products cyclized to the corresponding functionalized piperidines 8 under base-catalyzed conditions. Simultaneous equilibration of (E)-4 and (Z)-4 was effected by photoisomerization to improve the efficiency of the cyclization.
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.
Preparation of Unsaturated Aminonitriles from the Aza-Morita-Baylis-Hillman Reactions of Aldimines with Penta-2,4-dienenitrile
作者:Thomas Back、Kristen Clary
DOI:10.1055/s-2007-990886
日期:2007.12
mines undergo facile aza-Morita-Baylis-Hillman reactions with penta-2,4-dienenitrile in anhydrous DMF in the presence of catalytic 3-hydroxyquinuclidine and methanol to afford the corresponding unsaturated aminonitriles.