894-22-4

Basic information

• Product Name: spiro (3,4-dihydroisocoumarin-3,3'-phthalide)
• Synonyms: spiro (3,4-dihydroisocoumarin-3,3'-phthalide)
• CAS NO: 894-22-4
• Molecular Weight: 266.253
• Mol File: 894-22-4.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: spiro (3,4-dihydroisocoumarin-3,3'-phthalide)(CAS DataBase Reference)
• NIST Chemistry Reference: spiro (3,4-dihydroisocoumarin-3,3'-phthalide)(894-22-4)
• EPA Substance Registry System: spiro (3,4-dihydroisocoumarin-3,3'-phthalide)(894-22-4)

Safety Data

• Hazardous Substances Data: 894-22-4(Hazardous Substances Data)

Upstream product

• 85-44-9 phthalic anhydride 
• 89-51-0 Homophthalic acid 
• 4281-16-7 2-[2-(2-carboxyphenyl)acetyl]benzoic acid 

Downstream Products

• 83983-07-7 2-(3-Methyl-4-oxo-3,4-dihydrophthalazin-1-ylmethyl)-benzoesaeuremethylester 
• 51107-08-5 1-Benzyl-3-methyl-4-oxo-3,4-dihydrophthalazin 
• 4281-16-7 2-[2-(2-carboxyphenyl)acetyl]benzoic acid 
• 83983-03-3 2-(4-Oxo-3,4-dihydrophthalazin-1-ylmethyl)-benzoesaeure 
• 83983-04-4 2-(3-Methyl-4-oxo-3,4-dihydrophthalazin-1-ylmethyl)-benzoesaeure 

Relevant articles and documents

Novel Reactions: Part II - Homologous Condensations of Phthalic and Homophthalic Anhydrides; 13C NMR and Mechanism of Formation of Isocoumarins

The condensations of phthalic and homophthalic anhydrides with homophthalic acid do not yield the corresponding diketones (5 and 10) and/or their tautomeric enols, but give the corresponding isocoumarin derivatives (6 and 11) along with their spirodilactones (7 and 12).The UV, IR, PMR and mass spectral data suggest either the isocoumarin or the diketonic structures for the products.However, the structures have been unambiguously established by 13C NMR spectroscopic analysis.A plausible mechanism for the formation of isocoumarins has also been discussed.