An Efficient and General Iron-Catalyzed CC Bond Activation with 1,3-Dicarbonyl Units as a Leaving Groups
作者:Huanrong Li、Wenjuan Li、Weiping Liu、Zhiheng He、Zhiping Li
DOI:10.1002/anie.201006779
日期:2011.3.21
With our compliments: The 1,3‐dicarbonyl unit has been shown to be a new and useful leaving group for iron‐catalyzed bond cleavage (see scheme). This new strategy can complement the traditional Friedel–Crafts reaction and was applied in the synthesis of indene derivatives.
sp3-sp2 C-C Bond Formation via Brønsted Acid Trifluoromethanesulfonic Acid-Catalyzed Direct Coupling Reaction of Alcohols and Alkenes
作者:Hui-Lan Yue、Wei Wei、Ming-Ming Li、Yong-Rong Yang、Jian-Xin Ji
DOI:10.1002/adsc.201100262
日期:2011.11
A novel and efficient trifluoromethanesulfonic acid-catalyzed sp3-sp2 CC bond formation reaction through the direct coupling of alcohols with alkenes has been realized under mild conditions. The present protocol provides an attractive approach to a diverse range of polysubstituted olefins in good to excellent yields with high stereo- and regioselectivities.
Calcium(II) catalyzed regioselective dehydrative cross-coupling reactions: Practical synthesis of internal alkenes and benzopyrans
作者:Srinivasarao Yaragorla、Abhishek Pareek、Ravikrishna Dada、Abdulrahman I. Almansour、Natarajan Arumugam
DOI:10.1016/j.tetlet.2016.11.027
日期:2016.12
the regioselectivesynthesis of internal alkenes through a dehydrative cross-coupling and direct coupling procedure has been described using the environmentally benign Ca(II) catalyst. Several alkenes and alcohols underwent the coupling reaction under solvent-free conditions in a short time to produce the desired alkenes. This method is further extended to show the application in the synthesis of novel
Stereoselective Palladium-Catalyzed Decarboxylative γ-Arylation of Acyclic β,γ-Unsaturated Carboxylic Acids
作者:Ina Scheipers、Eva Koch、Armido Studer
DOI:10.1021/acs.orglett.7b00512
日期:2017.4.7
Palladium-catalyzed γ-arylation of acyclic β,γ-unsaturated carboxylic acids with various aryliodides is reported. The cascade comprises a decarboxylative γ-palladation of β,γ-unsaturated α,α′-disubstituted carboxylic acids and subsequent C(sp2)–C(sp3) bond formation to provide diaryl vinyl methanes in moderate to good yields and high E/Z-selectivities. Reaction with an enantiomerically pure acid revealed
Acidic ionic liquid was used as a metal-free and recyclable catalyst for the synthesis of polysubstitutedolefins by activating of ethers in dimethyl carbonate as a green solvent. Density functional theory (DFT) calculations showed a hydrogen bonding effect during the reaction.