Journal
TETRAHEDRON LETTERS
Volume 59, Issue 23, Pages 2284-2287Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2018.05.001
Keywords
Rhodium-catalyzed; Sulfoxonium ylides; 2H-indazoles
Categories
Funding
- National Natural Science Foundation of China [21572025, 21602019]
- Innovation & Entrepreneurship Talents Introduction Plan of Jiangsu Province
- Natural Science Foundation of Jiangsu Province [BK20171193]
- Key University Science Research Project of Jiangsu Province [15KJA150001]
- Jiangsu Key Laboratory of Advanced Catalytic Materials Technology [BM2012110]
- Advanced Catalysis and Green Manufacturing Collaborative Innovation Center
- Young Natural Science Foundation of Jiangsu Province [BK20150263]
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A Rh(III) catalyzed [4 + 1] annulation of azobenzenes with alpha- carbonyl sulfoxonium ylides was developed to access 2H-indazoles in moderate to excellent yields with good functional group compatibilities. It proceeded with the sequential insertion of the Rh(III) carbene to the C-H bond and cyclization steps, where sulfoxonium ylides served as efficient and stable carbene precursor. (C) 2018 Published by Elsevier Ltd.
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