Synthesis of Pd phosphine-imine complexes and their reactivity with base

Publication date: Available online 30 October 2018Source: Journal of Organometallic ChemistryAuthor(s): Kyle M.K. Jackman, Amanda A. Fogh, James M. Stubbs, Johanna M. BlacquiereAbstractTwo phosphine-imine ligands were synthesized in which the heteroatoms were connected by an ethyl (1a) or a propyl (1b) linker. Both ligands were reacted with PdCl(Me)(COD), which gave the square planar complexes PdCl(Me)(κ2-P,N-1a) (2a) and PdCl(Me)(κ2-P,N-1b) (2b). Both complexes were treated with base in pyridine in an effort to prepare phosphine 1-azaallyl complexes of the type Pd(Me)(κ2-P,N-L)(py). Deprotonation of 2a gave an intractable mixture of products. In contrast, deprotonation of 2b afforded a new product 4b. However, the site of deprotonation was the methylene adjacent to the phosphine rather than Cα to the imine carbon, deprotonation of which would have afforded a 1-azaallyl moiety.Graphical abstract
Source: Journal of Organometallic Chemistry - Category: Chemistry Source Type: research
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