Synthesis of N,N′-disubstituted cyclic 1,2-diamines derived from (1R,2R)-1,2-diaminocyclohexane
作者:Ewan Boyd、Gregory S. Coumbarides、Jason Eames、Ray V.H. Jones、Majid Motevalli、Rachel A. Stenson、Michael J. Suggate
DOI:10.1016/j.tetlet.2005.03.128
日期:2005.5
The synthesis of N,N'-unsymmetrically tetrasubstituted cyclic 1,2-diamines derived from (IR,2R)-diaminocyclohexane is reported. We comment on the structural nature of these cyclic 1,2-diamines and discuss their characteristic features. (c) 2005 Elsevier Ltd. All rights reserved.
Electronic effects on the acidity of phosphorus(III) triflates
作者:Sylvie L Renard、Terence P Kee
DOI:10.1016/s0022-328x(01)01460-7
日期:2002.2
range of chiral phosphorus(III) triflates has been prepared and their donor–acceptor behaviourtowards the representative donor 4-phenylpyridine investigated. Correlations between 31P-NMR shifts, relative binding strengths (Kr) and the electronic nature of the phosphorus complex are observed. A scale of relative Lewis acidity (Ar) is proposed for this class of phosphoruscompoundtowards donor molecules