868064-40-8

Upstream product

• 112275-50-0 tert-butyl 1,4-diazepine-1-carboxylate 
• 106-38-7 para-bromotoluene 

Downstream Products

• 1192191-39-1 1-(4-methylphenyl)-1,4-diazepane hydrochloride 
• 868064-41-9 4-[4-(p-tolyl)-1,4-diazepan-1-yl]-2-thioxo-1,2-dihydropyridine-3-carbonitrile 
• 868064-39-5 3-amino-4-[4-(4-methylphenyl)-1,4-diazepan-1-yl]thieno[2,3-b]pyridine-2-carboxamide 
• 41885-96-5 1-(p-tolyl)-1,4-diazepane 

Relevant academic research and scientific papers

Discovery and structure-activity relationship of thienopyridine derivatives as bone anabolic agents

A cell-based assay was performed for the discovery of novel bone anabolic agents. Alkaline phosphatase (ALPase) activity of ST2 cells was utilized as an indicator of osteoblastic differentiation, and thienopyridine derivative 1 was identified as a hit compound. 3-Aminothieno[2,3-b]pyridine-2-carboxamide was confirmed to be a necessary core structure for the enhancement of ALPase activity, and then optimization of the C4-substituent on the thienopyridine ring was carried out. Introduction of cyclic amino groups to the C4-position of the thienopyridine ring improved the activity. Especially, N-phenyl-homopiperazine derivatives were found to be strong enhancers of ALPase among this new series. Furthermore, 3-amino-4-(4-phenyl-1,4-diazepan-1-yl)thieno[2,3-b]pyridine-2- carboxamide (15k) was orally administered to ovariectomized (OVX) rats over 6 weeks for evaluating the effects on areal bone mineral density (aBMD), and statistically significant improvements in aBMD were observed from the dosage of 10 mg/kg/day.

N-Arylation of protected azamacrocycles

A rapid method for efficient palladium-catalyzed N-arylation of polynitrogenated macrocycles is presented. Its applicability for functionalization of protected azamacrocycles of various sizes with substituted aryl bromides of optional electronic properties is demonstrated. The compatibility of the protocol with common N-protecting schemes as well as the impact of electronic versus steric factors is discussed. Using a commercially available catalytic system and easily available alkoxide or phenoxide base, the method provides moderate to excellent yields of N-arylated azamacrocycles (45-96%). Georg Thieme Verlag Stuttgart · New York.

An improved synthesis of N-aryl and N-heteroaryl substituted homopiperazines-from conventional thermal conditions to scaling-up using microwave heating

An efficient Pd(0)-catalyzed Buchwald-Hartwig protocol for the facile preparation of N-aryl and N-heteroaryl substituted homopiperazines is described. The syntheses proceeded with aryl- and heteroaryl halides in high yields using X-Phos as best ligand. Th