Mixed-Ligand Arenechromium Carbonyl Complexes as Electronic Modulators
摘要:
A number of mixed ligand eta(6) arenechromium carbonyl complexes have been prepared and investigated for their ability to effect electronic modulation of arene chemistry. In the case of an aniline-derived system, the arenechromium carbonyl complex is able to modulate the inductive capacity of the aniline nitrogen atom and thus, regulate its anchimeric ability. In the case of 8-phenylmenthol and benzyloxazolidinone derivatives, modulation of arene ar basicity is achieved, and results suggest that important vinylarene pi-pi interactions exist in acrylate derivatives of these chiral auxiliary systems.
An efficient and high regioselectivity for monobromination of a family of anilines in the para position is reported. Tetraethylammonium Chloride / Methanol are used as cocatalysts.
报道了对位苯胺家族的单溴化的高效和高区域选择性。氯化四乙铵/甲醇用作助催化剂。
Mixed-Ligand Arenechromium Carbonyl Complexes as Electronic Modulators
作者:Graham B. Jones、Brant J. Chapman、Jude E. Mathews
DOI:10.1021/jo9721103
日期:1998.5.1
A number of mixed ligand eta(6) arenechromium carbonyl complexes have been prepared and investigated for their ability to effect electronic modulation of arene chemistry. In the case of an aniline-derived system, the arenechromium carbonyl complex is able to modulate the inductive capacity of the aniline nitrogen atom and thus, regulate its anchimeric ability. In the case of 8-phenylmenthol and benzyloxazolidinone derivatives, modulation of arene ar basicity is achieved, and results suggest that important vinylarene pi-pi interactions exist in acrylate derivatives of these chiral auxiliary systems.