754232-02-5

Upstream product

• 33170-68-2 1,3-bis-(4-bromo-phenyl)-propane-1,3-dione 
• 95-54-5 1,2-diamino-benzene 

Downstream Products

• 1393092-74-4 (2S,4S)-2,4-bis(4-bromophenyl)-2,3,4,5-tetrahydro-1H-1,5-benzodiazepine 
• 1393092-76-6 2,4-bis(4-bromophenyl)-2,3,4,5-tetrahydro-1H-1,5-benzodiazepine 

Relevant academic research and scientific papers

Enantioselective synthesis of tunable chiral pyridine-aminophosphine ligands and their applications in asymmetric hydrogenation

A small library of tunable chiral pyridine-aminophosphine ligands were enantioselectively synthesized based on chiral 2-(pyridin-2-yl)-substituted 1,2,3,4-tetrahydroquinoline scaffolds, which were obtained in high yields and with excellent enantioselectivities via ruthenium-catalyzed asymmetric hydrogenation of 2-(pyridin-2-yl)quinolines. The protocol features a wide substrate scope and mild reaction conditions, enabling scalable synthesis. These chiral P,N ligands were successfully applied in the Ir-catalyzed asymmetric hydrogenation of benchmark olefins and challenging seven-membered cyclic imines including benzazepines and benzodiazepines. Excellent enantio- and diastereoselectivity (up to 99% ee and >20:1 dr), and/or unprecedented chemoselectivity were obtained in the asymmetric hydrogenation of 2,4-diaryl-3H-benzo[b]azepines and 2,4-diaryl-3H-benzo[b][1,4]diazepines.

Asymmetric hydrogenation of 2,4-disubstituted 1,5-benzodiazepines using cationic ruthenium diamine catalysts: An unusual achiral counteranion induced reversal of enantioselectivity

BArFing it out the other way: A highly enantioselective hydrogenation of 2,4-disubstituted 1,5-benzodiazepines using chiral cationic ruthenium diamine catalysts (R,R)-1 has been developed (see scheme; BArF=tetrakis(3,5- bistrifluoromethylphenyl)borate). E