Lewis acid (FeCl3) mediated dual bond (C–C and C–O) formation for synthesis of 3,4-dihydrocoumarins is presented. This method has successfully delivered a number of dihydrocoumarins containing dense functionalities on the aromatic ring. Significantly, the present method enabled achieving dihydrocoumarins with tertiary as well as quaternary carbon atoms at the benzylic position. Gratifyingly, the novel spiro-tetracyclic lactones have also been dextrously prepared using this process.
Arylalkylation of Phenols and Naphthols with Derivatives of styrene
作者:Ng. Ph. Buu-Hoi、Henri Le. Bihan、Fernand Binon、Pierre Maleyran
DOI:10.1021/jo50008a011
日期:1952.8
Synthesis of Substituted (±)-3,4-Dihydrocoumarins Using H-Y Zeolite
作者:Manojkumar R. Shukla、Prashant N. Patil、Prakash P. Wadgaonkar、Prafulla N. Josh、Manikrao M. Salunkhe
DOI:10.1080/00397910008087290
日期:2000.1
Synthesis of substituted (+/-)-3,4 Dihydrocoumarins were prepared with the reaction between substituted cinnamic acid and phenol catalysed by eco-friendly solid-acid catalyst H-Y zeolite involving esterification followed by ring closure.
Shukla; Padiya; Patil, Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1999, vol. 38, # 3, p. 372 - 375
作者:Shukla、Padiya、Patil、Salunkhe
DOI:——
日期:——
A convenient synthesis of dihydrocoumarins from phenols and cinnamic acid derivatives
A facile procedure for synthesis of dihydrocoumarin derivatives was described. Although the yield of the products in the reaction of phenols with acrylates in trifluoroacetic acid in the presence of Pd(OAc)2 giving coumarins was found to be very low, dihydrocoumarin derivatives were obtained in good to high yields in the absence of Pd(OAc)2 when ethyl cinnamates bearing electron-donating groups were