Sc(OTf)3-Catalyzed [3 + 3] Cycloaddition of Cyclopropane 1,1-Diesters with Phthalazinium Dicyanomethanides
摘要:
The Sc(OTf)(3)-catalyzed diastereoselective [3 + 3] cycloaddition of phthalazinium dicyanomethanides with cyclopropane 1,1-diesters proceeded smoothly under mild reaction conditions, affording a variety of 3,4-dihydro-1H-pyrido[2,1-a]phthalazine derivatives in up to 99% yields with excellent diastereoselectivities.
[2+2+2] Cycloadditions of Siloxy Alkynes with 1,2-Diazines: From Reaction Discovery to Identification of an Antiglycolytic Chemotype
作者:Timothy J. Montavon、Yunus E. Türkmen、Noumaan A. Shamsi、Christopher Miller、Chintan S. Sumaria、Viresh H. Rawal、Sergey A. Kozmin
DOI:10.1002/anie.201305711
日期:2013.12.16
Cycloaddition uncovered: The title reaction produces novel polycyclic compounds with high efficiency and excellent diastereoselectivity under mild reaction conditions. A small‐molecule library, synthesized using this reaction, yielded a novel chemotype which inhibited glycolytic ATP production by blocking glucose uptake in CHO‐K1 cells. DMF=N,N‐dimethylformamide, Tf=trifluoromethanesulfonyl, TIPS=triisopropylsilyl
未发现环加成反应:在温和的反应条件下,标题反应产生了高效且具有优异非对映选择性的新型多环化合物。使用该反应合成的小分子文库产生了一种新的化学型,该化学型通过阻断 CHO-K1 细胞中的葡萄糖摄取来抑制糖酵解 ATP 的产生。DMF= N,N-二甲基甲酰胺,Tf=三氟甲磺酰基,TIPS=三异丙基甲硅烷基。
Metal-Free Formal Inverse-Electron-Demand Diels–Alder Reaction of 1,2-Diazines with Ynamides
作者:Jian Xue、Erhui Gao、Xiao-Na Wang、Junbiao Chang
DOI:10.1021/acs.orglett.8b02431
日期:2018.10.5
A highly effective metal-free formal inverse-electron-demand Diels–Alder reaction of 1,2-diazines with ynamides has been developed. This catalytic protocol is more environmentally friendly and allows for the construction of 2-aminonaphthalenes and 2-aminoanthracenes from 1,2-diazines and ynamides in good to high yields with wide diversity and functional group tolerance.
Asymmetric Dearomatization of Phthalazines by Anion-Binding Catalysis
作者:Marta Velázquez、Rosario Fernández、José M. Lassaletta、David Monge
DOI:10.1021/acs.orglett.3c03325
日期:2023.12.15
A straightforward methodology for the enantioselective synthesis of 1,2-dihydrophthalazines via dearomatization of phthalazines by anion-binding catalysis has been developed. The process involves the Mannich-type addition of silyl ketene acetals to in situ generated N-acylphthalazinium chlorides using a tert-leucine derived thiourea as a H-bond donor catalyst. Ensuing selective and high-yielding transformations
Silver-Catalyzed Formal Inverse Electron-Demand Diels–Alder Reaction of 1,2-Diazines and Siloxy Alkynes
作者:Yunus E. Türkmen、Timothy J. Montavon、Sergey A. Kozmin、Viresh H. Rawal
DOI:10.1021/ja302537j
日期:2012.6.6
A highly effective silver-catalyzed formal inverse electron-demand Diels-Alder reaction of 1,2-diazines and siloxyalkynes has been developed. The reactions provide ready access to a wide range of siloxy naphthalenes and anthracenes, which are formed in good to high yields, under mild reaction conditions, using low catalyst loadings.