89901-19-9

Basic information

• Product Name: 7b-Methyl-7bH-cyclopenta[cd]indene-5-sulfonic acid; compound with 2-benzyl-isothiourea
• CAS NO: 89901-19-9
• Molecular Weight: 400.522
• Mol File: 89901-19-9.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: 7b-Methyl-7bH-cyclopenta[cd]indene-5-sulfonic acid; compound with 2-benzyl-isothiourea(CAS DataBase Reference)
• NIST Chemistry Reference: 7b-Methyl-7bH-cyclopenta[cd]indene-5-sulfonic acid; compound with 2-benzyl-isothiourea(89901-19-9)
• EPA Substance Registry System: 7b-Methyl-7bH-cyclopenta[cd]indene-5-sulfonic acid; compound with 2-benzyl-isothiourea(89901-19-9)

Safety Data

• Hazardous Substances Data: 89901-19-9(Hazardous Substances Data)

Upstream product

• 89901-20-2 N-chlorosulphonyl-2,9b-dihydro-9b-methyl-1H-indeno<1,7-cd>azepin-1-one 
• 79644-47-6 7b-methyl-7bH-cyclopentindene 
• 90144-81-3 2a,4a-dibromo-4a,7b-dihydro-7b-methyl-2aH-cyclopentindene 
• 538-28-3 S-benzylisothiourea hydrochloride 
• 89901-17-7 sodium 7b-methyl-7bH-cyclopentindene-5-sulphonate 

Relevant articles and documents

Tricyclic annulenes. Part 3. Reactions of 7b-Methyl-7bH-cyclopentindene

The chemical reactions of the tricyclic annulene (1) are described.The annulene is rapidly hydrogenated to give the fully saturated hydrocarbon (2).It undergoes a substitution reaction with electrophiles and has been nitrated, acetylated, formylated, and sulphonated.The preferential sites of attack of electrophiles are C-5 and C-1.Although the annulene (1) does not undergo cycloaddition reaction with tetracyanoethylene, dimethyl acetylenedicarboxylate, or benzyne, it does react with 4-phenyl-1,2,4-triazole-3,5-dione in refluxing 1,2-dimethoxyethane to give the 2:1 adduct (17) and with chlorosulphonyl isocyanate to give the ring-expanded indenoazepine (19).Hydrolysis of (19) gives the amide (20), which shows some antiaromatic character.