Efficient Catalysis of Aqueous Morita-Baylis-Hillman Reactions of Cyclic Enones by a Bicyclic Imidazolyl Alcohol
作者:Juliana C. Gomes、Manoel T. Rodrigues Jr.、Albert Moyano、Fernando Coelho
DOI:10.1002/ejoc.201200950
日期:2012.12
phosphorus-free catalyst for the Morita–Baylis–Hillmanreaction is disclosed. A bicyclicimidazolylalcohol having a Lewis basic center associated with a hydrogen-bond donor group was used as catalyst for the reaction. Aliphatic cycloalkanones such as 2-cyclopentenone and 2-cyclohexanone and aliphatic and aromatic aldehydes were used successfully, and the reaction was found to work nicely using water
Rhodium(II)-Catalyzed Reaction of 1-Tosyl-1,2,3-triazoles with Morita-Baylis-Hillman Adducts: Synthesis of 3,4-Fused Pyrroles
作者:Renmeng Jia、Jiang Meng、Jiaying Leng、Xingxin Yu、Wei-Ping Deng
DOI:10.1002/asia.201800057
日期:2018.9.4
A cascade reaction of rhodium azavinylcarbenes with Morita–Baylis–Hillman (MBH) adducts enables a novel synthetic approach to 3,4‐fused pyrroles. The cascade reaction begins with the insertion of O−H bond into rhodium azavinylcarbenes, subsquent sigmatropic rearrangement provides substituted α,β‐unsaturated cyclic ketone intermediates. Then the intramolecular aza Michael addition/oxidative aromatization
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。
A highly efficient kinetic resolution of Morita–Baylis–Hillman adducts achieved by N–Ar axially chiral Pd-complexes catalyzed asymmetric allylation
作者:Feijun Wang、Shengke Li、Mingliang Qu、Mei-Xin Zhao、Lian-Jun Liu、Min Shi
DOI:10.1039/c1cc15543a
日期:——
Palladium complexes with an axially chiral NâAr framework have been developed. These complexes showed high stereoselectivities in asymmetric allylic arylation to achieve the kinetic resolution of MoritaâBaylisâHillman adducts, affording up to 99% ee of (E)-allylation products and 92% ee of recovered MoritaâBaylisâHillman adducts.
Abstract An efficient NaNO2-catalyzed synthesis of 2-methylene-3-cyclohexenones from easily accessible cyclohexenone-MBH acetates has been established for the first time. Target products were rapidly generated in moderate to high yields and with relatively high E/Z selectivity. Easy operation, good functional group tolerance, mild reaction conditions and the practicality of high efficiency of NaNO2