protocol for the reductive functionalization of amides into N‐sulfonylformamidines is reported. The one‐pot procedure is based on a mild catalyticreduction of tertiary amides into the corresponding enamines by the use of Mo(CO)6 (molybdenum hexacarbonyl) and TMDS (1,1,3,3‐tetramethyldisiloxane). The formed enamines were allowed to react with sulfonyl azides to give the target compounds in moderate to
Nickel catalyzed addition of -NH- containing compounds to vinyl and aryl halides
申请人:E.I. DU PONT DE NEMOURS AND COMPANY
公开号:EP1178040A1
公开(公告)日:2002-02-06
A process for producing unsaturated nitrogen containing compounds such as enamides, enamines and aryl amines/amides is disclosed. A vinyl halide or aryl halide is reacted with an -NH- containing compound in the presence of a catalytic amount of a catalyst precursor composition comprising zero-valent nickel and an organophosphine ligand. One step coupling of vinyl halides and aryl halides with -NH- containing compounds is made possible by practice of this invention.
Reactivity of four-membered cyclic nitrones in 1,3-cycloaddition reactions. X-Ray crystal structure of 7-(2,6-dichlorophenyl)-N,N-diethyloctahydro-6-methyl-1,3-dioxo-2-phenylazeto[1,2-b]pyrrolo[3,4-d]isoxazole-6-carboxamide
作者:Peter J. S. S. van Eijk、Willem Verboom、Frank C. J. M. van Veggel、David N. Reinhoudt、Sybolt Harkema
DOI:10.1002/recl.19881070308
日期:——
diethyl maleate yielded the corresponding azeto[1,2-b]pyrrolo[3,4-d]isoxazole derivatives, 8 and 9, respectively. The exclusive formation of the exo-conformation of the cycloadducts was unequivocally proven by X-ray analysis of 8a. Reaction of 2a with methyl 2-propenoate (methyl acrylate) and 3-buten-2-one (methyl vinyl ketone) gave regio- and stereoselectively the corresponding exo-5′-isoxazolidine
四元环硝酮1和2与乙炔二羧酸二甲酯反应,生成相应的环加合物3,4。2a与苯乙炔反应后,获得5'-取代的异恶唑啉衍生物5。2a与丙酸甲酯的反应分别生成4'-和5'-环加合物δ,7和6的1:4混合物。的反应2a-c中与N-苯基马来酰亚胺和的图2a与马来酸二乙酯,得到相应azeto [1,2-b]吡咯并[3,4-d]异恶唑衍生物,8和9, 分别。Xa射线分析8a明确证明了环加合物的exo-构象的排他性形成。的反应图2a用甲基-2-丙烯酸酯(甲基丙烯酸酯)和3-丁烯-2-酮(甲基乙烯基酮),得到区域选择性和立体选择性地对应的外-5'-异恶唑烷cycloadducts,10和11,分别。环加合物的立体化学由1 H NMR数据推导。炔烃和烯烃双极性亲和剂均从空间较少受阻的一侧接近四元环硝酮,导致所获得的环加合物的(区域和)立体选择性形成。