An Efficient Approach for the Construction of Benzazepine and Benzoxepine Derivatives
作者:Shaoyu Li、Shaowu Zou、Jie Wu
DOI:10.1002/asia.201200636
日期:2012.12
A novel and facile synthetic protocol for the construction of benzazepine and benzoxepine derivatives through a copper(I)‐catalyzed reaction of 2‐(2‐ethynylphenyl)‐1‐tosylaziridine or 2‐(2‐ethynylphenyl)oxirane with sulfonyl azides is disclosed. A ketenimine is the key intermediate during the reaction process.
A copper(i)-catalyzed reaction of 2-(2-ethynylphenyl)oxirane, sulfonyl azide, with 2-isocyanoacetate
作者:Shaoyu Li、Jie Wu
DOI:10.1039/c2cc34591a
日期:——
A novel and straightforward synthetic protocol for the efficient construction of 3',5'-dihydro-1H-spiro[benzo[d]oxepine-2,4'-imidazoles] through a copper(I)-catalyzed reaction between 2-(2-ethynylphenyl)oxirane, sulfonyl azide, and 2-isocyanoacetate is described.
Ruthenium-Catalyzed Cyclization of Epoxide with a Tethered Alkyne: Formation of Ketene Intermediates via Oxygen Transfer from Epoxides to Terminal Alkynes
作者:Reniguntala J. Madhushaw、Ming-Yuan Lin、Shariar Md. Abu Sohel、Rai-Shung Liu
DOI:10.1021/ja049943c
日期:2004.6.1
Treatment of (o-ethynyl)phenyl epoxides with TpRuPPh(3)(CH(3)CN)(2)PF(6) (10 mol %) in hot toluene (100 degrees C, 3-6 h) gave 2-naphthols or 1-alkylidene-2-indanones very selectively with isolated yields exceeding 72%, depending on the nature of the epoxide substituents. Surprisingly, the reaction intermediate proved to be a ruthenium-pi-ketene species that can be trapped efficiently by alcohol to