Efficient synthesis of β-substituted α-haloenones by rhodium(ii)-catalyzed and thermal reactions of iodonium ylides
作者:Yong Rok Lee、Yong Ug Jung
DOI:10.1039/b111206f
日期:2002.5.10
Rhodium(II)-catalyzed and thermal reaction of iodonium ylides are described. Rhodium(II)-catalyzed reactions of iodonium ylides with benzyl halides and acid halides afforded α-chloro-α,β-enones and α-bromo-α,β-enones in good yields, whereas thermal reactions of iodonium ylides in a solvent such as benzene afforded α-iodo-α,β-enones in good yields.
Novel method for the synthesis of β-substituted α-haloenones by rhodium(II)-catalyzed reactions of diazodicarbonyl compounds with benzyl halides
作者:Yong Rok Lee、Dae Hwan Kim
DOI:10.1016/s0040-4039(01)01345-4
日期:2001.9
The rhodium(II)-catalyzed reactions of diazodicarbonyl compounds with benzyl halides give β-substituted α-haloenones in good yields.
重氮二羰基化合物与苄基卤化物的铑(II)催化反应以良好的收率得到了β-取代的α-卤代烯酮。
A convenient and efficient preparation of β-substituted α-haloenones from diazodicarbonyl compounds
作者:Yong Rok Lee、Bang Sub Cho、Hyuk Jin Kwon
DOI:10.1016/j.tet.2003.09.087
日期:2003.11
Rhodium(II)-catalyzed reactions of cyclic diazodicarbonyl compounds with a variety of halides have been examined. With acid halides, β-acyloxy α-haloenones are produced in good yields. With benzyl halides, β-benzyloxy α-haloenones are obtained in good yields. Reactions with methylene halides yield β-halomethoxy α-haloenones in good yields, whereas reactions with ethyl halides and ethylene dihalides