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Upstream product

• 67901-95-5 (E)-2-(4-methoxyphenyl)-3-(3,4-dimethoxyphenyl)acrylic acid 
• 104-01-8 4-Methoxyphenylacetic acid 
• 120-14-9 3,4-dimethoxy-benzaldehyde 
• 129047-47-8 (E)-2-(4-Methoxy-phenyl)-3-(2,4,5-trimethoxy-phenyl)-acrylic acid 
• 108-24-7 acetic anhydride 
• 68742-17-6 (E)-2-(4-methoxyphenyl)-3-(2-amino-4,5-dimethoxyphenyl)cinnamic acid 

Relevant academic research and scientific papers

Synthesis of some new 3-phenylcoumarins

(E)-α-Phenylcinnamic acids (2) on heating with pyridine/POCl3 have been found to afford the corresponding 3-phenylcoumarins (5).However, with diazomethane the acids 2 give the corresponding (E)-esters (4) and not the isomeric (Z)-acids (3).

The Oxidation of (E)-α-Phenylcinnamic Acids with Manganese(III) Acetate

The oxidation of eight (E)-α-phenylcinnamic acids with manganese(III) acetate in boiling acetic acid containing acetic anhydride gave 3-phenylcoumarins, 3-phenyl-1-oxaspirodeca-3,7,9-triene-2,6-diones, 2-phenylbenzofurans, 3-(acetoxymethyl)-2-phenylbenzofurans, 3-formyl-2-phenylbenzofuran, 2-acetoxy-2-phenyl-3(2H)-benzofuranones, (Z)-Α-acetoxystilbenes, 2-acetoxy-1,2-diphenylethanones, 5-acetoxy-4,5-diphenyl-2(5H)-furanones, and diphenylacetylene.Tha reaction pathways are discussed.