Bifunctional Polymeric Organocatalysts and Their Application in the Cooperative Catalysis of Morita–Baylis–Hillman Reactions
作者:Cathy Kar-Wing Kwong、Rui Huang、Minjuan Zhang、Min Shi、Patrick H. Toy
DOI:10.1002/chem.200601197
日期:2007.3.5
these polymeric reagents contained either alkyl alcohol or phenol groups on the polymer backbone. The use of these materials as organocatalysts in a range of Morita-Baylis-Hillman reactions indicated that hydroxyl groups could participate in the reactions and accelerate product formation. In the cases examined, phenol groups were more effective than alkyl alcohol groups for catalyzing the reactions
Novel Quinidine-Derived Organocatalysts for the Asymmetric Substitutions of O-Boc-Protected Morita-Baylis-Hillman Adducts
作者:Cheng-Kui Pei、Xiu-Chun Zhang、Min Shi
DOI:10.1002/ejoc.201100501
日期:2011.8
A series of novelquinidine-derivedorganocatalysts was synthesized and utilized for the asymmetricsubstitution of O-Boc-protectedMorita–Baylis–Hillmanadducts with various carbamates and tosylcarbamates, affording the corresponding products in good to high yields (up to 91 % yield) with moderate to high ee values (up to 96 % ee) under mild conditions.
Polymer-Supported Lewis Bases for the Baylis–Hillman Reaction
作者:Jin-Wen Huang、Min Shi
DOI:10.1002/adsc.200303072
日期:2003.8
of polymer-supported Lewisbases such as PEG4600-(PPh2)2 and poly(DMAP) in the Baylis–Hillman reactions of N-tosylimines (ArCHNTs) 1 or the corresponding arenecarbaldehydes with α,β-unsaturated ketones has been investigated. The corresponding Baylis–Hillman adducts are obtained in good yields. The polymer-supported Lewisbases can be easily recovered by filtration and the Lewis base PEG4600-(PPh2)2
New discovery in the traditional Baylis-Hillman reaction of arylaldehydes with methyl vinyl ketone
作者:Min Shi、Chao-Qun Li、Jian-Kang Jiang
DOI:10.1039/b101019k
日期:——
In the Baylis-Hillman reaction of arylaldehydes with methylvinylketone, we found that, besides the normal Baylis-Hillman reaction product 1, the diadduct 2 can also be formed at the same time and the yield of 2 can reach 55% by increasing the amount of methylvinylketone; but for acrylonitrile and methyl acrylate, only the normal Baylis-Hillman adduct was obtained; the substituent’s effects were
Studying the Morita-Baylis-Hillman Reaction in Continuous Flow Using Packed Bed Reactors
作者:Rasmus A. T. Verdier、Jesper H. Mikkelsen、Anders T. Lindhardt
DOI:10.1021/acs.oprd.8b00298
日期:2018.11.16
Conditions for the Morita-Baylis-Hillmanreaction were developed under continuous flow using a packed bed reactor carrying 4-(dimethylamino)pyridine immobilized on silica. High reaction rates were obtained, as the packed bed reactor mimics super-stoichiometric catalyst loadings for the passing reaction mixture. Catalyst deactivation was circumvented by avoiding acrylate esters as the reaction partners. The