221687-50-9

Upstream product

• 147895-43-0 S-methylisothiourea hemisulphate 
• 1138-80-3 N-(Benzyloxycarbonyl)glycine 
• 184576-06-5 tert-butyl 2-[(3S)-3-[3-[(tert-butoxycarbonyl)amino]propyl]-2-oxopiperazinyl]acetate 
• 184576-18-9 (S)-4-benzyloxycarbonylaminoacetyl-3-{3-(4-tert-butoxycarbonylaminobutanoylamino)-propyl)-2-oxopiperazine-1-acetic acid 
• 184576-10-1 (S)-4-benzyloxycarbonylaminoacetyl-3-(3-tert-butoxycarbonylaminopropyl)-2-oxopiperazine-1-acetic acid tert-butyl ester 
• 189366-00-5 [(S)-3-(3-Amino-propyl)-4-(2-benzyloxycarbonylamino-acetyl)-2-oxo-piperazin-1-yl]-acetic acid 

Relevant academic research and scientific papers

Potent dibasic GPIIb/IIIa antagonists with reduced prolongation of bleeding time: Synthesis and pharmacological evaluation of 2-oxopiperazine derivatives

A series of 2-oxopiperazine derivatives, possessing basic moieties at the 3- and the 4-positions, were synthesized and evaluated for their abilities to inhibit platelet aggregation and for their effects on bleeding time. Among the compounds, 2-[(3S)-4-[2-[(4-guanidinobenzoyl)amino] acetyl]3-[3-[(4-guanidinobenzoyl)amino]propyl]-2-oxopiperazinyl]acetic acid (12c) showed a potent inhibitory effect on platelet aggregation and good dissociation between the efficacy and the bleeding side effect. Intravenous infusion of compound 12c at 1.6 μg/mL/min. completely prevented arterial thrombus formation induced by endothelial injury in guinea pigs. The dose of 12c that prolonged the bleeding time to three times the control value was 5.8/μg/mL/min. These results suggest that compound 12c might be useful in the clinical treatment of thrombotic diseases, and we selected 12c (TAK-024) as a candidate for the clinical trials.

Freeze-dried preparation for pharmaceutical use

A freeze-dried preparation comprising a bioactive substance having an optionally substituted amidino group and a disaccharide which stabilizes the bioactive substance; and a process for making the preparation are described.