Regioselective Palladium(II)-Catalyzed Desulfitative Heck-Type Reaction: Access to α-Benzyl-β-keto Esters from Baylis-Hillman Adducts and Sodium Sulfinates
摘要:
A new palladium(II)-catalyzed desulfitative Heck-Type arylation from sodium arenesulfinates and Baylis-Hillman adducts for the synthesis of highly functionalized alpha-benzyl-beta-keto ester derivatives in good to excellent yields has been developed. This methodology is simple and mild, it can utilize halogen bearing building blocks, and it has excellent regioselectivity.
The ‘Baylis - Hillman Reaction’ mechanism and applications revisited
作者:Yves Fort、Marie Christine Berthe、Paul Caubere
DOI:10.1016/s0040-4020(01)88227-2
日期:1992.1
It is shown that reaction of aryl, benzyl, alkyl and functionalised alkyl acrylic esters with benzaldehyde, in the presence of 1,4-diazabicyclo[2.2.2] octane, strongly depends upon the electronic and steric effects of the ester part. This influence is also observed in condensation of furfuraldehyde. Moreover, for the first time, it is shown that the overall condensation is equilibrated.
The Aqueous Trimethylamine Mediated Baylis-Hillman Reaction
Aqueous trimethylamine mediated Baylis-Hillman coupling of alkyl acrylates with aldehydes is described.
Baylis–Hillman reaction promoted by a recyclable protic-ionic-liquid solvent–catalyst system: DABCO–AcOH–H2O
作者:Ying Song、Haihua Ke、Nan Wang、Limin Wang、Gang Zou
DOI:10.1016/j.tet.2009.09.049
日期:2009.11
A recyclable protic-ionic-liquid solvent-catalyst system, DABCO-AcOH-H2O, has been developed and used in the Baylis-Hillman reaction of aromatic aldehydes, aliphatic aldehydes, and cinnamaldehydes with acrylates and acrylonitrile, showing comparable performance to free DABCO in traditional solvents. The DABCO-AcOH-H2O solvent-catalyst system could be reused for at least five times without significant loss of activity. (C) 2009 Elsevier Ltd. All rights reserved.
Sequential Morita–Baylis–Hillman/Achmatowicz reactions: an expeditious access to pyran-3(6H)-ones with a unique substitution pattern
作者:Bruno B. Guidotti、Fernando Coelho
DOI:10.1016/j.tetlet.2015.09.120
日期:2015.11
We herein disclosed a novel approach to synthesize densely functionalized 6-hydroxy-2H-pyran-3(6H)-ones with moderate to good diastereoselectivity. The method is based on a two step sequence using Morita-Baylis-Hillman adducts as substrates for the Achmatowicz rearrangement, allowing the preparation of highly substituted pyran-3-ones with overall yields ranging from 17% to 80% and a unique substitution pattern. (C) 2015 Elsevier Ltd. All rights reserved.