期刊
TETRAHEDRON
卷 69, 期 32, 页码 6591-6597出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tet.2013.05.132
关键词
Sulfur-cobalt nitrate; Aromatic nitriles; Cascade catalysis; Oxazines; Oxazolines
资金
- National Natural Science Foundation of China [NSFC 20972124, 21272184, 21143010]
- Shaanxi Provincial Natural Science Fund Project [2012JQ2007]
- Shaanxi Science and Technology Coordination Innovation Engineering Project [2011K12-77]
- Special Science Research Foundation of Education Committee in Shaanxi Province [12JK0584]
- Chinese National Innovation Experiment Program for University Students [201210697011]
A solvent-free S/Co(NO3)(2) cascade catalyzed cyclocondensation reaction of aromatic nitriles with 3-amino-1-propanol or 2-aminoethanol has been successfully developed under thermal and microwave conditions. By this two-component protocol, mono- and bis-oxazines and oxazolines were selectively synthesized both in good to excellent yields and short reaction times. This catalytic system exhibits excellent chemoselectivity, and can be reused at least seven times without significant loss of activity in subsequent reactions. (C) 2013 Elsevier Ltd. All rights reserved.
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