4281-21-4

Basic information

• Product Name: 3,3'-DIPHTHALIDE
• Synonyms: 3,3'-DIPHTHALIDE;TIMTEC-BB SBB001031;3 3'-DIPHTHALIDE 96%;3-(3-oxo-1H-2-benzofuran-1-yl)-3H-2-benzofuran-1-one
• CAS NO: 4281-21-4
• Molecular Formula: C₁₆H₁₀O₄
• Molecular Weight: 266.25
• Mol File: 4281-21-4.mol
• Article Data: 4

Chemical Properties

• Melting Point: 262 °C(lit.)
• Appearance: /
• CAS DataBase Reference: 3,3'-DIPHTHALIDE(CAS DataBase Reference)
• NIST Chemistry Reference: 3,3'-DIPHTHALIDE(4281-21-4)
• EPA Substance Registry System: 3,3'-DIPHTHALIDE(4281-21-4)

Safety Data

• WGK Germany: 3
• Hazardous Substances Data: 4281-21-4(Hazardous Substances Data)

Upstream product

• 4281-16-7 2-[2-(2-carboxyphenyl)acetyl]benzoic acid 
• 87-41-2 2-benzofuran-1(3H)-one 
• 85-44-9 phthalic anhydride 
• 16859-59-9 3-hydroxy-1(3H)-isobenzofuranone 
• 140-29-4 phenylacetonitrile 
• 643-79-8 o-phthalic dicarboxaldehyde 
• 7732-18-5 water 
• 91413-16-0 potassium 2-carboethoxybenzoate 
• 89-51-0 Homophthalic acid 
• 56526-10-4 o,o'-Bis(methoxycarbonyl)stilbene 
• 2975-71-5 2-[(3-oxo-1,3-dihydro-2-benzofuran-1-yl)methyl]benzoic acid 
• 73049-16-8 stilbene-2,2'-dicarboxylic acid 
• 4281-19-0 α-(o-carboxybenzoyl)phtalide 
• 119-67-5 o-carboxybenzaldehyde 

Downstream Products

• 2975-71-5 2-[(3-oxo-1,3-dihydro-2-benzofuran-1-yl)methyl]benzoic acid 
• 72872-62-9 o,o'-benzil dicarboxylic acid 
• 1064110-31-1 1-(o-tolyl)-3-[1-(o-tolyl)benzo[c]thiophen-3-yl]benzo[c]thiophene 

Relevant articles and documents

Photochemistry of o-Phthalaldehyde

U.v.-irradiation of o-phthalaldehyde leads to the formation of phthalide and dimeric products in varying yields and ratios depending on the solvent and reagent concentration.Laser flash photolysis studies show that the photochemistry of o-phthalaldehyde involves the intermediacy of a 1,4-biradical produced by intramolecular hydrogen transfer, and with a lifetime of 1.6 μs.Two triplet states are the precursors of the biradical; they have lifetimes of 6 and 36 ns and are assigned to different rotational conformers.The triplet reaction path is not responsible for product formation; these arise via a parallel reaction path, apparently involving the singlet state.

Central nervous system active compounds. IV. Synthesis of 3-aminobenzylphthalides

-