期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 135, 期 21, 页码 7926-7932出版社
AMER CHEMICAL SOC
DOI: 10.1021/ja4032727
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资金
- College of Science Start-Up Grants from Nanyang Technological University (NTU)
- Science and Engineering Research Council Grant from A*STAR, Singapore [092 101 0053]
- NTU
A synthetic method to prepare 2,4a-dihydro-1H-fluorenes efficiently from gold(I)-catalyzed 1,2-acyloxy migration/cyclopropenation/Nazarov cyclization of 1,6-diyne carbonates and esters is described. The suggested reaction pathway provides rare examples of [2,3]-sigmatropic rearrangement in this class of compounds as well as the involvement of an in situ formed cyclopropene intermediate in gold catalysis. Experimental and ONIOM(QM:QM') [our own n-layered integrated molecular orbital and molecular mechanics(quantum mechanics quantum mechanics')] computational studies based on the proposed Au carbenoid species provide insight into this unique selectivity.
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