Engineering an efficient and enantioselective enzyme for the Morita–Baylis–Hillman reaction
作者:Rebecca Crawshaw、Amy E. Crossley、Linus Johannissen、Ashleigh J. Burke、Sam Hay、Colin Levy、David Baker、Sarah L. Lovelock、Anthony P. Green
DOI:10.1038/s41557-021-00833-9
日期:2022.3
approach has delivered enzymes for a handful of model reactions. Here we show that new catalytic mechanisms can be engineered into proteins to accelerate more challenging chemical transformations. Evolutionary optimization of a primitive design afforded an efficient and enantioselective enzyme (BH32.14) for the Morita–Baylis–Hillman (MBH) reaction. BH32.14 is suitable for preparative-scale transformations
Remarkable Rate Acceleration of Imidazole-Promoted Baylis−Hillman Reaction Involving Cyclic Enones in Basic Water Solution
作者:Sanzhong Luo、Peng George Wang、Jin-Pei Cheng
DOI:10.1021/jo035345p
日期:2004.1.1
The Baylis−Hillmanreaction of cyclic enones was greatly accelerated in basic water solution with imidazoles as catalysts, which resulted in short reaction time, high yields, and expanding substrate scopes. Bicarbonate solution was shown to be the optimal reaction medium for the reaction in this study. The apparent “enhanced basicity” of imidazoles accounted for the rate increase in alkaline solution
Protein self-assembly induces promiscuous nucleophilic biocatalysis in Morita–Baylis–Hillman (MBH) reaction
作者:Pralhad N. Joshi、Landa Purushottam、Nirmal K. Das、Saptarshi Mukherjee、Vishal Rai
DOI:10.1039/c5ra23949d
日期:——
Self-assembled states of proteins render efficient promiscuous nucleophilic biocatalysis in MBH reaction in a green process.
蛋白质的自组装状态在MBH反应中实现了高效的杂多亲核生物催化作用,这是一种绿色过程。
Lewis Base Effects in the Baylis−Hillman Reaction of Arenecarbaldehydes and N-Arylidene-4-methylbenzenesulfonamides with α,β-Unsaturated Cyclic Ketones
and 2-cycloocten -1- one in methanol, products 10 - derived from Michaeladditions of methanol to 9-were formed as the major products, along with traces of 9. In general, the ring-size of the α,β-unsaturated cyclic ketone can significantly affect the reaction products and rates, the Baylis-Hillman reaction and the aldolcondensation reaction taking place at the same time for 2-cyclohexen-1-one or 2-cyclohepten-1-one
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