Conjugated cyclic enones react smoothly in water with a variety of aldehydes (Baylis-Hillman reaction) in the presence of surfactants above their critical micelle concentrations (CMC).
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。
The effect of chiral <i>N</i>-substituents with methyl or trifluoromethyl groups on the catalytic performance of mono- and bifunctional thioureas
作者:Josué Vazquez-Chavez、Socorro Luna-Morales、Diego A. Cruz-Aguilar、Howard Díaz-Salazar、Wilmer E. Vallejo Narváez、Rodrigo S. Silva-Gutiérrez、Simón Hernández-Ortega、Tomás Rocha-Rinza、Marcos Hernández-Rodríguez
DOI:10.1039/c9ob01893j
日期:——
thiourea organocatalysts that incorporate a chiral group which includes a trifluoromethyl moiety and contrasted their performance with non-fluorinated analogs. The comparison between such systems allows the direct study of the NH acidity of a thiourea bonded to an aliphatic substituent. In principle, –CF3 systems feature an enhanced hydrogen bond (HB) donor capacity that is undoubtedly beneficial for
Iron(III) chloride-catalysed direct nucleophilic α-substitution of Morita-Baylis-Hillman alcohols with alcohols, arenes, 1,3-dicarbonyl compounds, and thiols
作者:Xiaoxiang Zhang、Weidong Rao、Sally、Philip Wai Hong Chan
DOI:10.1039/b908447a
日期:——
A general and efficient direct method for the α-substitution of Morita-Baylis-Hillman alcohols with carbon- and heteroatom-centred nucleophiles such as alcohols, arenes, 1,3-dicarbonyl compounds, and thiols in the presence of FeCl3·6H2O as catalyst has been developed. The reaction is operationally straightforward, accomplished in good to excellent product yields (40â99%) and with exclusive α-regioselectivity under mild conditions that did not need an inert and moisture-free environment.