Ruthenium(II)-Catalyzed Cyclization of Aromatic Acids with Allylic Acetates via Redox-Free Two-Fold Aromatic/Allylic C–H Activations: Combined Experimental and DFT Studies
A Ru(II)-catalyzed, redox-free, two-fold aromatic/allylic C–H bond activation of aromatic acids with allylic acetates to give (Z)-3-ylidenephthalides is described. In the reaction, H2 was formed as a side product. The detailed mechanistic investigation and DFT studies including the transition-state analysis support the postulate that the C–H allylation takes place at the ortho position of aromatic
Acid–base-sensitive allylic oxidation of 2-allylbenzoic acids to form phthalides
作者:Le Thi Ngoc Chuc、Thi Anh Hong Nguyen、Duen-Ren Hou
DOI:10.1039/d0ob00303d
日期:——
corresponding phthalides selectively. Mechanistic studies, including the corresponding reaction of (E)-2-(1-propenyl)benzoicacid to 3-methylisocoumarin, isomerization reaction of 3-vinylphthalide to 3-ethylidenephthalide, and the kinetic isotope effect using 2-(1,1-d2-allyl)benzoicacid, revealed the competition between Wacker-type oxidation and allylic C-H cleavage, which is the key step to generating