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1,3-Dipolar [3+3] Cycloaddition of 1,4-Benzodiazepinone-Based Nitrones with α-Halohydroxamates for Diastereoselective Synthesis of Novel d-Edge Heterocycle-Fused 1,4-Benzodiazepinones

Autor: Lu-Yu Cai, Zhe Tang, Xiao-Fan Bi, Hui-Hui Wu, Heng Zhang, Hong-Wu Zhao, Xiao-Zu Fan

Publikováno v: Synlett. 32:1974-1980

Promoted by K2CO3 (2.0 equiv), the 1,3-dipolar [3+3] cycloaddition between 1, 4-benzodiazepinone-based nitrones and α-halohydroxamates processed smoothly under the mild reaction conditions and delivered structurally novel and complex cis- or trans

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::17f7e877d3b19aa32f8670bc0880c427
https://doi.org/10.1055/a-1642-0598

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Stereoselective Synthesis of Polyfunctionalized Nitrones through Conjugate Addition of α-Halo Hydrazones to Nitroso Compounds

Autor: Heng Zhang, Xiao-Zu Fan, Xiao-Fan Bi, Lu-Yu Cai, Hong-Wu Zhao, Hui-Hui Wu, Zhe Tang, Hai-Liang Pang

Publikováno v: Synlett. 32:1457-1460

In the presence of Na2CO3, conjugate addition of α-halo hydrazones to nitroso compounds proceeded readily to give polyfunctionalized nitrones in reasonable chemical yields and excellent stereoselectivities. The chemical structure and the stereochemi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::01899e91aba547779dcc64dcfd3952b8
https://doi.org/10.1055/a-1509-0949

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Diastereoselective Synthesis of Spiropyrazolones via 1,3-Dipolar [3+2] Cycloadditions between Pyrazolone-Based Olefins and N,N′-Cyclic Azomethine Imines

Autor: Xiao-Fan Bi, Xiao-Zu Fan, Hong-Wu Zhao, Heng Zhang, Lu-Yu Cai, Zhe Tang, Hui-Hui Wu

Publikováno v: Synlett. 32:1201-1206

Under the catalysis of PhCO2H, the 1,3-dipolar [3+2] cycloaddition between pyrazolone-based olefins and N,N′-cyclic azomethine imines proceeded readily, thus delivering structurally novel spiropyrazolones with up to 98% yield and >20:1 dr. The re

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::47e42bdc68ef6224a73f7cae9934ce55
https://doi.org/10.1055/a-1506-4509

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Palladium-Catalyzed Formal (5 + 6) Cycloaddition of Vinylethylene Carbonates with Isatoic Anhydrides for the Synthesis of Medium-Sized N,O-Containing Heterocycles

Autor: Heng Zhang, Hui-Hui Wu, Xiao-Fan Bi, Lu-Yu Cai, Zhe Tang, Hong-Wu Zhao, Xiao-Zu Fan

Publikováno v: Organic Letters. 23:2802-2806

Under the reaction conditions of Pd(PPh3)4 (2.5 mol %) and PPh3 (10 mol %) in EtOAc at 60 °C, the formal (5 + 6) cycloaddition of vinylethylene carbonates with isatoic anhydrides proceeded smoothly and furnished medium-sized N,O-containing heterocyc

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::11bbcdabb831793c7fe8900052f6829c
https://doi.org/10.1021/acs.orglett.1c00729

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Formal [5+3] Cycloaddition between Isatin-Based α-(Trifluoromethyl)imine Ylides and Vinyloxiranes: Diastereoselective Access to Medium-Heterocycle-Fused Spirooxindoles

Autor: Xiao-Zu Fan, Hong-Wu Zhao, Ding Wanqiu, Hui-Hui Wu, Wang Liru, Xiao-Fan Bi, Guo Jiaming, Qi-Di Zhong, Zhe Tang, Xiu-Qing Song

Publikováno v: Synlett. 32:57-62

In the presence of Pd2(dba)3·CHCl3 (2.5 mol%), PPh3 (10 mol%), and 60% NaH (1.5 equiv), the formal [5+3] cycloaddition between isatin-based α-(trifluoromethyl)imines and vinyloxiranes proceeded readily in 1,2-DCE at 40 ℃ and afforded cis-configur

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8e0af3bf8c490ccc681b98ca57d90f62
https://doi.org/10.1055/s-0040-1706537

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Diastereoselective formal [3 + 3] cycloaddition of isatin-based α-(trifluoromethyl)imines with N,N′-dialkyloxyureas

Autor: Guo Jiaming, Wang Liru, Ding Wanqiu, Xiu-Qing Song, Xiao-Fan Bi, Zhe Tang, Xiao-Zu Fan, Hong-Wu Zhao, Hui-Hui Wu

Publikováno v: Organic Chemistry Frontiers. 6:3891-3895

In the presence of PhI(OH)(OTs) and NaH, the diastereoselective formal [3 + 3] cycloaddition of isatin-based α-(trifluoromethyl)imines with N,N′-dialkyloxyureas proceeded readily, and furnished the relatively trans-configured novel spiro-1,3,5-tri

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0c0a2a3a8dbe08ee11bcaa671bca1bd9
https://doi.org/10.1039/c9qo01181a

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