developed via the oxidative umpolung of bromide using alkali metal bromide and inorganic oxidant to provide the corresponding cyclization products in high yields. In particular, the use of AcOEt, the solvent of choice for green sustainable reactions, led to the high reactivities of the present reactions. This methodology is highly recommended for green sustainable chemistry because it uses stable and non-hazardous
Chiral selenide-catalyzed enantioselective trifluoromethylthiolation of 1,1-disubstituted alkenes is disclosed. By this method, a variety of chiral trifluoromethylthiolated 2,5-disubstituted oxazolines were obtained in good yields with high enantioselectivities. This work not only provides a new pathway for the synthesis of chiraloxazolines, but also expands the library of chiral trifluoromethylthiolated
Visible-light-induced photocatalytic oxytrifluoromethylation of N-allylamides for the synthesis of CF<sub>3</sub>-containing oxazolines and benzoxazines
A visible-light-induced photocatalytic oxytrifluoro-methylation reaction of N-allylamides has been described for the efficient synthesis of CF3-containing oxazolines and benzoxazines in generally high yields.
Chlorosulfonamide Salts Are Superior Electrophilic Chlorine Precursors for the Organocatalytic Asymmetric Chlorocyclization of Unsaturated Amides
作者:Arvind Jaganathan、Babak Borhan
DOI:10.1021/ol500861z
日期:2014.7.18
serve as readily available, stable, and inexpensive precursors of electrophilic chlorine in the organocatalytic asymmetric chlorofunctionalization of olefins. In conjunction with commercially available organocatalysts, they can be utilized in the asymmetricchlorocyclization of unsaturatedamides to yield products with unprecedented levels of stereoselectivity even at ambient temperatures and high concentrations