期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 53, 期 23, 页码 5959-5963出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201400675
关键词
alkynes; carbenes; cyclization; heterocycles; ruthenium
资金
- MICINN (Spain) [CTQ2011-28258, CSD2007-00006]
- Xunta de Galicia
- European Regional Development Fund [CN2011/054, EM 2012/051]
- XUGA
A novel synthesis of 2-vinyldihydropyrans and dihydro-1,4-oxazines (morpholine derivatives) from alkynals and alkynones has been developed. The cyclizations require a mild generation of catalytic ruthenium carbenes from terminal alkynes and (trimethylsilyl) diazomethane followed by trapping with carbonyl nucleophiles. Mechanistic aspects of the new cyclizations are discussed.
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