Pd-Catalyzed C-H Olefination of (Hetero)Arenes by Using Saturated Ketones as an Olefin Source
作者:Yaping Shang、Xiaoming Jie、Jun Zhou、Peng Hu、Shijun Huang、Weiping Su
DOI:10.1002/anie.201208627
日期:2013.1.21
Tolerant: By using Pd(OAc)2/PCy3 as a catalyst, both electron‐rich aromatic heterocycles and electron‐deficient fluorobenzenes undergo the dehydrogenative cross‐coupling with (hetero)aryl ethyl ketones in good yields. A broad range of functional groups is tolerated, thus providing a general method for the facile syntheses of chalcones or heterocyclic chalcone analogues. Furthermore, dialkyl ketones can also
Reactions of 2,5-Furandicarbaldehyde with Stabilized Phosphonium Ylides. Applications to the Synthesis of 5-Vinyl-2-furaldehyde and 2,5-Divinylfuran Derivatives
作者:Carmen Domínguez、Aurelio G. Csákÿ、Javier Magano、Joaquín Plumet
DOI:10.1055/s-1989-27184
日期:——
By simple modification of the molar proportion of reactants, it was possible to selectively functionalize an aldehyde group in 2,5-furandicarbaldehyde (1), by Wittig reaction with stabilized ylides 2, The scope of the procedure is extended to the preparation of certain furancontaining natural fatty acid analogues.