酸介导的邻羰基化炔基取代的芳基醛与酚的多米诺反应:快速获得稠合的茚并[2,1 - c ] chromen-7-one衍生物
摘要:
描述了邻羰基化的炔基取代的芳醛与酚的酸介导的多米诺反应。该反应的实施可以直接以良好的产率提供多种四环茚并[2,1 - c ] chromen-7-one产物。提出的机理是多米诺骨牌茚满酮环的形成/酚的邻烷基化/脱水环化以形成多环骨架。另外,尽管具有中等收率,也选择性地提供了几种含有五环骨架的有趣的二聚体产物。本发明的转化特征在于使用简单的酸催化剂,较短的反应时间和良好的底物范围。
Silver-Catalyzed Reaction of Enynals with Alkenes: A Tandem 1,3-Dipolar Cycloaddition/Cyclopropanation
作者:Renxiao Liang、Tongmei Ma、Shifa Zhu
DOI:10.1021/ol5017299
日期:2014.9.5
silver-catalyzed reaction of enynals with alkenes to synthesize a series of polycyclic compounds has been developed. The reaction occurred smoothly using enynals with electron-deficient alkynes or terminal alkynes as substrates. The reaction was proposed to proceed through a tandem 1,3-dipolar cycloaddition/cyclopropanation process. The preliminary investigations of the asymmetric catalytic version revealed that
Cascade One-Pot Synthesis of Indanone-Fused Cyclopentanes from the Reaction of Donor-Acceptor Cyclopropanes and Enynals <i>via</i>
a Sequential Hydrolysis/Knoevenagel Condensation/[3+2] Cycloaddition
作者:Jiantao Zhang、Huanfeng Jiang、Shifa Zhu
DOI:10.1002/adsc.201700345
日期:2017.9.4
to construct indanone‐fused cyclopentanes via a sequential hydrolysis/Knoevenagelcondensation/[3+2] cycloaddition is reported. The desired indanone‐fused cyclopentanes were obtained in good yields. This method features mild reaction conditions and broad substrate scope, which render it very appealing to chemists for the synthesis of complex molecules containing an indanone‐fused cyclopentane moiety
An efficient route to highly strained cyclobutenes: indium-catalyzed reactions of enynals with alkynes
作者:Renxiao Liang、Huanfeng Jiang、Shifa Zhu
DOI:10.1039/c4cc08506j
日期:——
synthesize the highly strained cyclobutene was developed. The reaction was believed to proceed through a formal indium-catalyzed [2+2] cycloaddition between electron-deficient enynals and various alkynes.
A one‐pot tandemprocess involving hydrolysis, Knoevenagel condensation, Michael addition, and Conia‐ene (HKMC) reactions has been developed for the rapid synthesis of indanone‐fused 2‐methylenetetrahydrofurans from the reaction of enynals and propynols. In this process, two rings and four bonds are generated with 100 % atom‐economy and high step‐efficiency. The resulting tetrahydrofurans were readily
Silver-Catalyzed Domino Reaction of ortho-Carbonylated Alkynyl-Substituted Arylaldehydes with Conjugated Dienes: Stereoselective Access to Indanone-Fused Cyclohexenes
作者:Ziping Cao、Hongbo Zhu、Xin Meng、Laijin Tian、Guang Chen、Xuejun Sun、Jinmao You
DOI:10.1021/acs.joc.6b02529
日期:2016.12.16
A silver-catalyzed domino reaction of ortho-carbonylated alkynyl-substituted arylaldehydes with conjugated dienes is described here. Through this reaction, the synthesis of a variety of indanone-fused cyclohexene derivatives can be achieved efficiently. The formation of these tricyclic products could involve a key Diels–Alder reaction of in situ generated indanenone dienophiles with conjugated dienes