Water Compatible Multicomponent Cascade Suzuki/Heck-Aldol, Suzuki-Aldol-Suzuki, and Aldol-Suzuki-Aldol Reactions: An Ecofriendly Paradigm for Multiple CarbonCarbon Bond Formation in One Pot
作者:Rajesh Kumar、Richa、Nitin H. Andhare、Amit Shard、Arun K. Sinha
DOI:10.1002/chem.201303069
日期:2013.10.25
Aryls in hot water: A versatile strategy has been devised for the synthesis of biologically active biaryl(hetero)chalcones from readily available precursors (see scheme). The method is step, pot, and carbon economic, ligand‐free, devoid of toxic reagents/solvents, and has a wide substrate scope.
the resulting intermediates underwent an in-situ aldolcondensationreaction to give biaryl(hetero)chalcones in good to excellent yields. When the protocol was applied to highly lipophilic or less reactive reagents, micellar catalysis was required for good results. To achieve this, we successfully used a new surfactant obtained from renewable resources that we recently designed. Furthermore, using
Polyaniline coated on celite, a heterogeneous support for palladium: applications in catalytic Suzuki and one-pot Suzuki–aldol reactions
作者:Heta A. Patel、Arun L. Patel、Ashutosh V. Bedekar
DOI:10.1039/c6nj02402e
日期:——
Particles of celite were coated with polyaniline, characterized and used as a support for heterogenization of palladium metal ions. The prepared heterogeneous palladium catalysts were screened for Suzuki–Miyaura and one-pot Suzuki–aldol reactions with high conversions. The process of heterogenization on celite reduces the PANI consumption ten-fold when anchoring palladium ions onto the support. The