Analyzing Site Selectivity in Rh<sub>2</sub>(esp)<sub>2</sub>-Catalyzed Intermolecular C–H Amination Reactions
作者:Elizabeth N. Bess、Ryan J. DeLuca、Daniel J. Tindall、Martins S. Oderinde、Jennifer L. Roizen、J. Du Bois、Matthew S. Sigman
DOI:10.1021/ja5015508
日期:2014.4.16
Predicting site selectivity in C–H bond oxidation reactions involving heteroatom transfer is challenged by the small energetic differences between disparate bond types and the subtle interplay of steric and electronic effects that influence reactivity. Herein, the factorsgoverningselective Rh2(esp)2-catalyzed C–H amination of isoamylbenzene derivatives are investigated, where modification to both
The amino-functionalization of tertiary, secondary and benzylic C–H bonds of tethered carbamates and sulfamates by iodosobenzene is catalyzed by CuI-diimine complexes in moderate to good yield. Employing homochiral imine-Cucatalysts affords oxazolidinones and oxathiazinanes with modest enantioselectivity.
Enantioselective intramolecular amidation of sulfamate esters catalyzed by chiral manganese(III) Schiff-base complexes
作者:Ji Zhang、Philip Wai Hong Chan、Chi-Ming Che
DOI:10.1016/j.tetlet.2005.05.146
日期:2005.8
Enantioselective intramolecularamidation of sulfamate esters catalyzed by chiral manganese(III) Schiff-base complexes under mild conditions (PhI(OAc)2, Al2O3, C6H6, 5 °C) was achieved in moderate to good yields (up to 92%), substrate conversions (up to 99%), with virtually complete cis-selectivity and with ee values up to 79% ee.
通过温和的条件下的手性锰(III)的席夫碱配合物催化的氨基磺酸酯的对映选择性的分子内酰胺化(PHI(OAC)2,AL 2 ö 3,C 6 H ^ 6,5℃)在中度至良好的产率达到(最多至92%),底物转化率(高达99%),几乎完全的顺式选择性和ee值高达ee的79%。