1020701-95-4

Basic information

• Product Name: benzoic 2-methyl-3-benzofurancarboxylic anhydride
• Synonyms: benzoic 2-methyl-3-benzofurancarboxylic anhydride
• CAS NO: 1020701-95-4
• Molecular Weight: 280.28
• Mol File: 1020701-95-4.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: benzoic 2-methyl-3-benzofurancarboxylic anhydride(CAS DataBase Reference)
• NIST Chemistry Reference: benzoic 2-methyl-3-benzofurancarboxylic anhydride(1020701-95-4)
• EPA Substance Registry System: benzoic 2-methyl-3-benzofurancarboxylic anhydride(1020701-95-4)

Safety Data

• Hazardous Substances Data: 1020701-95-4(Hazardous Substances Data)

Upstream product

• 98-88-4 benzoyl chloride 
• 3265-74-5 2-methyl-1-benzofuran-3-carboxylic acid 

Downstream Products

• 480-90-0 1H-inden-1-one 
• 88180-40-9 methylenebenzocyclobutenone 

Relevant articles and documents

Syntheses and pyrolyses of benzofuran analogues of α-oxo-o- quinodimethane. A study on vinylcarbene-cyclopropene rearrangement

(Chemical Equation Presented) Flash vacuum pyrolyses (FVP) of benzoic 3-methyl-2-benzofurancarboxylic anhydride (12) and benzoic 2-methyl-3- benzofurancarboxylic anhydride (13) at 550°C and ca. 10-2 torr both give methylenebenzocyclobutenone (21) as the major product and indenone (22) as the minor one. A mechanism involving generation of α-oxo-o- quinodimethane 11 as the primary pyrolysis product from FVP of 13, followed by elimination of a CO molecule to give carbene 24, which undergoes a vinylcarbene-cyclopropene rearrangement and a ring contraction of the resulting carbene 23, is proposed to account for the observed results. The proposed mechanism is further supported by a deuterium-labeling study on FVP of (2-benzofuryl)methyl-α,α-d2 benzoate (28-d2).