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
A Catalytic Asymmetric Chlorocyclization of Unsaturated Amides
作者:Arvind Jaganathan、Atefeh Garzan、Daniel C. Whitehead、Richard J. Staples、Babak Borhan
DOI:10.1002/anie.201006910
日期:2011.3.7
The asymmetricchlorocyclization of unsaturatedamides catalyzed by (DHQD)2PHAL yields oxazoline and dihydrooxazine derivatives (see scheme). The reaction is operationally simple and employs 1–2 mol % of the commercially available (DHQD)2PHAL (hydroquinidine 1,4‐phthalazinediyl diether) catalyst. Different substitution patterns of the olefin as well as aromatic and aliphatic olefin substituents are
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-mediated radical oxydifluoromethylation of olefinic amides for the synthesis of CF<sub>2</sub>H-containing heterocycles
作者:Weijun Fu、Xin Han、Mei Zhu、Chen Xu、Zhiqiang Wang、Baoming Ji、Xin-Qi Hao、Mao-Ping Song
DOI:10.1039/c6cc07771d
日期:——
The visible-light-mediated oxydifluoromethylation of olefinic amides with difluoromethyl sulfones has been explored.
已经探索了可见光介导的烯烃酰胺与二氟甲基砜的氧二氟甲基化。
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.