A general method for the synthesis of polyhydroxylated stilbene monofluorinated on the central double bond based on the Suzuki reaction between a bromofluoroolefin and a phenylboronic acid is described. Synthesis Of fluorinated analogues of resveratrol and pterostilbene was achieved using this strategy. (C) 2001 Elsevier Science Ltd. All rights reserved.
A general method for the synthesis of polyhydroxylated stilbene monofluorinated on the central double bond based on the Suzuki reaction between a bromofluoroolefin and a phenylboronic acid is described. Synthesis Of fluorinated analogues of resveratrol and pterostilbene was achieved using this strategy. (C) 2001 Elsevier Science Ltd. All rights reserved.
FGFR4 INHIBITOR AND PREPARATION METHOD AND USE THEREOF
申请人:Guangdong Zhongsheng Pharmaceutical Co., Ltd
公开号:EP3543227B1
公开(公告)日:2020-12-30
Palladium-Catalyzed Stereoconvergent Formylation of (<i>E</i>/<i>Z</i>)-β-Bromo-β-fluorostyrenes: Straightforward Access to (<i>Z</i>)-α-Fluorocinnamic Aldehydes and (<i>Z</i>)-β-Fluorocinnamic Alcohols
We report here the stereoconvergent formylation of (E/Z)-beta-bromo-beta-fluorostyrene mixtures with carbon monoxide and sodium formate catalyzed by palladium. Optimization of reaction conditions leads to the corresponding pure (Z)-alpha-fluorocinnamaldehydes in good yields. The reaction was extended to styrenes bearing electro-attracting or electro-donating groups. The obtained alpha-fluoroaldehydes were smoothly reduced to the corresponding (Z)-beta-fluorocinnamic alcohol by NaBH4. The reaction could be performed on functionalized substrates as demonstrated by the access to the glucoside of beta-fluoroconiferyl alcohol, (Z)-beta-fluoroconiferin, a strong inhibitor of lignin polymerization.