Symmetrical vicinal (R*,R*)-d,l-diamines were prepared from the corresponding imines and low valent titanium species generated by the action of titanium tetrachloride on amalgamated magnesium.
and versatile approach to 1,2-diamines has been developed based on reductivecoupling reactions of various imines, where perylene, an aromatic hydrocarbon, was used as a photoredox catalyst under visiblelight irradiation using a white light-emitting diode. The use of 1 mol % perylene enabled almost complete conversion of the imines, leading to the formation of their corresponding 1,2-diamines, which
Reductive coupling of aromatic aldehydes and imines by the low valent titanium species generated in the reaction of TiCl4 with Et3N
作者:Mariappan Periasamy、Gadthula Srinivas、Galla V Karunakar、Pandi Bharathi
DOI:10.1016/s0040-4039(99)01609-3
日期:1999.10
Aromatic aldehydes and imines are converted to the corresponding diols and diamines using the lowvalenttitanium species generated by the reaction of TiCl4 with triethylamine.
New reaction protocols have been established to perform the reductive coupling of N-benzyl benzaldimines to 1,2-diphenyl-1,2-diaminoethanes in mild, stereoselective, and catalytic conditions by the use of SmI2 and Yb(OTf)(3). (C) 1998 Elsevier Science Ltd. All rights reserved.