716337-48-3

Upstream product

• 93878-26-3 dimethyl 6,6'-dimethylbiphenyl-2-2'-dicarboxylate 
• 108-86-1 bromobenzene 
• 461642-18-2 [2'-(hydroxy-diphenyl-methyl)-6,6'-dimethyl-biphenyl-2-yl]-diphenyl-methanol 

Relevant academic research and scientific papers

(P,M)-1,2,3,9,10,11 -Hexamethoxy-5,7-dihydrodibenz[c,e]oxepine and (P,M)-1,11 -dimethyl-5,5,7,7-tetraphenyl-5,7-dihydrodibenz[c,e]oxepine

The crystallographic C2 symmetry and seven-membered ring of C20H24O7 and C40H32O were analyzed. Both the molecules were racemic oxepines which adopted twisted-boat conformations and contain

Naphthalene-1,8-diylbis(diphenylmethylium) as an organic two-electron oxidant: Benzidine synthesis via oxidative self-coupling of N,N-dialkylanilines

Naphthalene-1,8-diylbis(diphenylmethylium) exhibits a unique electron-transfer reduction behavior due to the close proximity of the two triarylmethyl cations, which form a C-C bond while accepting two electrons, leading to 1,1,2,2-tetraphenylacenaphthene. The preparation of the dication was readily accomplished under anhydrous conditions starting from a cyclic bis(triarylmethyl) ether, derived from 1,8-dibromonaphthalene. The process proceeded via deoxygenation accompanying the formation of a disiloxane on treatment with a silylating agent (Me3SiClO4 or Me 3SiOTf) in 1,1,1,3,3,3-hexafluoropropan-2-ol. The dication was successfully employed for oxidative coupling of N,N-dialkylanilines at the paraposition to afford the corresponding benzidines in good to excellent yield.