Domino Hydroarylation-Cyclization Reaction: One-Pot Synthesis of Indane-Fused 3,4-Dihydrocoumarins
作者:Jin Hyuck Joo、So Won Youn
DOI:10.1002/adsc.201200745
日期:2013.1.9
A tin(II) triflate-catalyzed dominohydroarylation–cyclizationreaction has been developed to access a wide-variety of methyleneindane-fused 3,4-hydrocoumarins. A judiciously selected bi-functional Lewis acidic catalyst has been successfully applied to promote two ring-closing events as a single-pot operation.
Silver triflate-catalyzed three-component reaction of 2-alkynylbenzaldehyde, sulfonohydrazide, and α,β-unsaturated carbonyl compound
作者:Shengqing Ye、Xiaodi Yang、Jie Wu
DOI:10.1039/c0cc00905a
日期:——
A highly efficient silver triflate-catalyzed three-component reaction of 2-alkynylbenzaldehyde, sulfonohydrazide, and alpha,beta-unsaturated carbonyl compound is reported, which affords H-pyrazolo[5,1-a]isoquinoline-1-carboxylates in good yield.
NHC-Catalyzed Oxidative Cyclization Reactions of 2-Alkynylbenzaldehydes under Aerobic Conditions: Synthesis of O-Heterocycles
作者:Jong Hyub Park、Sachin V. Bhilare、So Won Youn
DOI:10.1021/ol200481u
日期:2011.5.6
An NHC-catalyzed, regio- and stereoselective oxidative cyclization of o-alkynylbenzaldehydes bearing an unactivated alkyne moiety as an internalelectrophile has been developed to afford phthalides and isocoumarins. A single organocatalytic system enabled two sequential C−O bond formations to take place in an atom economical manner via highly efficient dual activation. Molecular oxygen in air could
Enantioselective Construction of Vicinal Diaxial Styrenes and Multiaxis System via Organocatalysis
作者:Yu Tan、Shiqi Jia、Fangli Hu、Yidong Liu、Lei Peng、Dongmei Li、Hailong Yan
DOI:10.1021/jacs.8b09893
日期:2018.12.12
A highly diastereo- and enantioselective methodology for the asymmetric synthesis of vicinal diaxial styrenes and multiaxis system was achieved by organocatalysis. Various vicinal diaxial styrenes and multiaxis systems were obtained in excellent enantioselective manners. The mechanism studies revealed that a new tetra-substituted vinylidene ortho-quinone methide (VQM) intermediate was likely involved
<i>N</i>-Iodosuccinimide-Mediated Dimerization of 2-Alkynylnaphthols: A Highly Diastereoselective Construction of Bridged Polycyclic Compounds via Vinylidene <i>ortho</i>-Quinone Methide Intermediate
作者:Yu Tan、Zhengxing Zhao、Zhili Chen、Shengli Huang、Shiqi Jia、Lei Peng、Da Xu、Wenling Qin、Hailong Yan
DOI:10.1021/acs.orglett.0c01458
日期:2020.6.5
2-alkynylnaphthols is presented to furnish bridged polycycliccompounds containing a bicyclo[3.2.1]octane moiety with good to excellent yields. The reaction proceeded under mild conditions using N-iodosuccinimide as a promoter, simultaneously constructing one new C–O bond and two new C–C bonds. A tetra-substituted vinylidene ortho-quinone methideintermediate was likely involved, and the steric hindrance