799809-90-8

Basic information

• Product Name: 3-(benzo[b]thienyl-3-methylene)phthalide
• Synonyms: 3-(benzo[b]thienyl-3-methylene)phthalide
• CAS NO: 799809-90-8
• Molecular Weight: 278.331
• Mol File: 799809-90-8.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: 3-(benzo[b]thienyl-3-methylene)phthalide(CAS DataBase Reference)
• NIST Chemistry Reference: 3-(benzo[b]thienyl-3-methylene)phthalide(799809-90-8)
• EPA Substance Registry System: 3-(benzo[b]thienyl-3-methylene)phthalide(799809-90-8)

Safety Data

• Hazardous Substances Data: 799809-90-8(Hazardous Substances Data)

Upstream product

• 85-44-9 phthalic anhydride 
• 1131-09-5 benzo[b]thiophene-3-acetic acid 

Relevant articles and documents

Condensed pyridine bases. Synthesis and reactions of benzofuro[2,3-c] indeno[2,1-e]-, benzothieno[2,3-c]indeno[2,1-e]-, benzofuro-[3,2-c]indeno[2,1-e] - and thieno[2,3:4′,5′]-thieno[3,2-c]indeno[2,1-e]pyridines

Condensation of hetarene carboxaldehydes with phthalide gave 2-(3-hydroxy-1-oxoinden-2-yl)benzo[b]furan and 2-(3-hydroxy-1-oxoinden-2-yl)-5- ethylthieno[2,3-b]thiophene. Starting from hetaryl acetic acids gave 3-(3-hydroxy-1-oxoinden-2-yl)benzo[b]furan and 3-(3-hydroxy-1-oxoinden-2-yl) benzo[b]thiophene. Acylation of 3-hydroxy-1-oxoinden-2-yl-substituted heterocycles using acetic anhydride in the presence of 70% HClO4 leads to the formation of pentacyclic pyrilium salts. Pentacyclic indenopyridines are prepared by treating the pyrilium salts with ammonia. The reaction of the carbonyl group in the indenopyridines with hydroxylamine, hydrazine hydrate, and in reduction using NaBH4 has been studied.