902136-44-1

Upstream product

• 5551-12-2 4-bromo-2-nitrobenzaldehyde 
• 534-22-5 2-methylfuran 
• 904328-01-4 5,5'-((4-bromo-2-nitrophenyl)methylene)bis(2-methylfuran) 

Downstream Products

• 902136-42-9 2-acetylamino-4-bromophenylbis(5-methylfur-2-yl)methane 
• 1021941-23-0 5-bromo-2-bis(5-methyl-2-furyl)methylphenyl isothiocyanate 

Relevant academic research and scientific papers

Synthesis of 2,4-difuryl-4H-3,1-benzothiazines via a furan ring migration reaction

(Chemical Equation Presented) A new simple synthetic approach to 2,4-difuryl-4H-3,1-benzothiazines from 2-isothiocyanoaryldifurylmethanes in the presence of acidic catalyst is described. This rearrangement is a new example of furan ring migration reaction

Furan ring opening-indole ring closure: Synthesis of furo[2′, 3′:3,4]-cycloheota[1,2-b]indolium chlorides

A new synthetic approach to furo[2′,3′:3,4]cyclohepta[1,2-b] indolium chlorides is elaborated starting from 2-acetylaminoaryldifurylmethanes or 2-aminoaryldifurylmethanes under treatment with methanolic HCl solution. The reaction proceeds in three steps: recyclization, intramolecular cyclization, and disproportionation. In this case the furan ring takes part in building up both pyrrole and seven-membered rings. The same salts can be obtained directly from 2-acetylaminobenzaldehydes and 2-methylfuran under similar conditions without isolation of corresponding 2-acetylaminoaryldifurylmethanes.