Recyclable NaHSO4 catalyzed alkylation of tert-enamides with indoles or amines in water: facile construction of pharmaceutically analogous bis-alkaloid scaffolds
作者:Xue-Qiang Chu、Shun-Yi Wang、Shun-Jun Ji
DOI:10.1039/c3ra40833g
日期:——
An efficient sodium hydrogen sulfate catalyzed alkylation of indoles or amines with tertiary enamides has been accomplished in water, affording the pharmacologically and biologically active 2-oxo-1-pyrrolidine derivatives in moderate to excellent yields. The key to our success is the use of NaHSO4 as a low loading, inexpensive, green and recyclable catalyst and the reactions could be scaled up to gram level.
Dioxygen-Promoted Regioselective Oxidative Heck Arylations of Electron-Rich Olefins with Arylboronic Acids
作者:Murugaiah M. S. Andappan、Peter Nilsson、Henrik von Schenck、Mats Larhed
DOI:10.1021/jo049434t
日期:2004.8.1
with arylboronicacids. This appears to constitute the first example of palladium(II)-catalyzed internal Heck arylations. The novel protocol exploits oxygen gas for environmentally benign reoxidation and a stable 1,10-phenanthroline bidentate ligand to promote the palladium(II) regeneration and to control the regioselectivity. Internal arylation is strongly favored with electron-rich arylboronic acids
作者:Debasish Kundu、Manisha Tripathy、Pintu Maity、Brindaban C. Ranu
DOI:10.1002/chem.201500058
日期:2015.6.8
Cobalt(II)‐catalyzed C(sp2)O cross‐coupling between aryl/heteroaryl alcohols and vinyl/aryl halides in the presence of CuI has been achieved underligand‐free conditions. In this reaction, copper plays a significant role in transmetalation rather than being directly involved in the CO coupling. This unique Co/Cu‐dual catalyst system provides an easy access to a library of aryl–vinyl, heteroaryl–styryl
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.
A mild, general and efficient hydrocyanation and hydroarylation of enamines catalyzed by Co(salen) complexes are described. Both reactions include regioselective C-H bond formation of enamines, and the corresponding products are obtained in high yield. Hydroarylation critically discriminates the benzyl and benzoyl aromatic rings on nitrogen in cyclization step, and the corresponding isoindolinones