Highly diastereoselective spiro-cyclopropanation of 2-arylidene-1,3-indanediones and dimethylsulfonium ylides
作者:Jie Huang、Shaofa Sun、Ping Ma、Jian Wang、Kevin Lee、Yalan Xing、Yang Wu、Gangqiang Wang
DOI:10.1039/d1nj02886c
日期:——
This efficient and simple protocol features simple operations, mild conditions and excellent functional group compatibility. A variety of structurally interesting spiro-cyclopropanes were prepared in excellent yields and diastereomeric ratios (up to 97% yield and 20 : 1 dr). Also, ring expansion of the cyclopropanation product to quickly deliver a complex indeno[1,2-c]pyridazine structure showcased
2-亚芳基-1,3-茚二酮和二甲基锍叶立德的高度非对映选择性螺环丙烷化反应已通过碱诱导环化开发。这种高效简单的方案具有操作简单、条件温和、功能组兼容性好等特点。以优异的产率和非对映体比率(高达 97% 的产率和 20:1 dr)制备了各种结构有趣的螺环丙烷。此外,环丙烷化产物的扩环以快速提供复杂的茚并[1,2- c ]哒嗪结构展示了该方法的有趣应用。
Direct β-acylation of 2-arylidene-1,3-indandiones with acyl chlorides catalyzed by organophosphanes
作者:Chia-Jui Lee、Chia-Ning Sheu、Cheng-Che Tsai、Zong-Ze Wu、Wenwei Lin
DOI:10.1039/c3cc45201h
日期:——
We have developed an organophosphane-catalyzed direct β-acylation of a series of conjugated systems bearing ketone, amide and ester functionalities using acyl chlorides as trapping reagents. A wide variety of highly functional ketone derivatives were generated efficiently under very mild conditions with high yields according to our protocol. Our adducts can even be utilized as important building blocks for the synthesis of functional tri/tetracyclic pyridazine derivatives.
Contemporary development in sequential Knoevenagel, Michael addition multicomponent reaction for the synthesis of 4-Aryl-5-oxo-5H-indeno[1,2-b]pyridine-3-carbonitrile
作者:Ajinkya A. Patravale、Anil H. Gore、Dipti R. Patil、Govind B. Kolekar、Madhukar B. Deshmukh、Prafulla B. Choudhari、Manish S. Bhatia、Prashant V. Anbhule
DOI:10.1007/s11164-015-2187-y
日期:2016.4
Abstract An uncatalyzed efficient synthesis of bioactive pyridine derivatives has been investigated for the first time by a three-component sequential multicomponent reaction tackled with aromatic aldehydes, malononitrile, and 1,3-indandione via Knoevenagel condensation followed by Michael addition. The difference between the domino multicomponent and sequential multicomponent reaction is emphasized
Three-Component Triple Organocascade Synthesis of Hexahydropyridazine Derivatives via a Sequential Michael/Amination/Cyclization Reaction
作者:Yan Ming Chen、Kwunmin Chen
DOI:10.1002/jccs.201500227
日期:2015.10
The organocatalytic asymmetric synthesis of hexahydropyridazines were performed through a unique Michael/amination/cyclization reaction. The organocascade reaction proceeded smoothly between 2‐arylidene‐1,3‐indandiones and aldehydes followed by the addition of azodicarboxylates catalyzed by the privileged organocatalyst α,‐α‐L‐diphenylprolinol trimethylsilyl ether (10 mol%) in the presence of a base