118503-15-4

Upstream product

• 111897-19-9 DDB 
• 118503-25-6 dimethyl 2,3-acetoxymethylenedioxy-2',3'-methylenedioxy-4,4'-dimethoxy-1,1'-biphenyl-6,6'-dicarboxylate 
• 118503-16-5 dimethyl 2,3-oxomethylenedioxy-2',3'-methylenedioxy-4,4'-dimethoxy-1,1'-biphenyl-6,6'-dicarboxylate 

Downstream Products

• 118503-23-4 2',3'-methylenedioxy-2,3,4,4'-tetramethoxy-1,1'-biphenyl-6,6'-dicarboxylic acid 

Relevant academic research and scientific papers

Monoacetoxylation of Methylenedioxy Groups in Dimethyl 4,4'-Dimethoxy-2,3,2',3'-bismethylenedioxy-1,1'-biphenyl-6,6'-dicarboxylate with Lead Tetraacetate

The utility of lead tetraacetate as a reagent for the monoacetoxylation of a methylenedioxy group in dimethyl 4,4'-dimethoxy-2,3,2',3'-bismethylenedioxy-1,1'-biphenyl-6,6'-dicarboxylate (1a) is demonstrated.Mechanistic feature of the monoacetoxylation is descussed.

Novel biphenyl derivative and preparation and use thereof

The present invention relates to a novel biphenyl derivative having a liver ailment-moderating action and effective as a remedy for acute hepatitis and chronic hepatitis, a process for the preparation of this biphenyl derivative and a liver ailment-moderating agent comprising this diphenyl derivative as an effective ingredient. This diphenyl derivative is represented by the following formula: STR1 wherein R0 and R1 independently stand for a lower alkyl group or R0 and R1 together represent a group O=C2 stands for an alkyl group having 1 to 3 carbon atoms, and R3 and R4 independently stand for a hydrogen atom or a lower alkyl group.