210288-67-8Relevant academic research and scientific papers
The development of a manufacturing route for the GPIIb/IIIa receptor antagonist SB-214857-A. Part 2: Conversion of the key intermediate SB-235349 to SB-214857-A
Atkins, Richard J.,Banks, Adam,Bellingham, Richard K.,Breen, Gary F.,Carey, John S.,Etridge, Stephen K.,Hayes, Jerome F.,Hussain, Nigel,Morgan, David O.,Oxley, Paul,Passey, Stephen C.,Walsgrove, Timothy C.,Wells, Andrew S.
, p. 663 - 675 (2013/09/05)
The process development to the manufacturing route to (2S)-7-([4,4′ -bipiperidin]-1-ylcarbonyl)-2,3,4,5-tetrahydro-4-methyl-3-oxo-1H-1, 4-benzodiazepine-2-acetic acid hydrochloride (SB-214857-A, lotrafiban) is described. The starting point is the previously reported intermediate (2RS)-2,3,4,5-tetrahydro-4-methyl-3-oxo-1H-1,4-benzodiazepine-2-acetic acid methyl ester. The first stage is a lipase-catalysed resolution of the racemic ester to (2S)-2,3,4,5-tetrahydro-4-methyl-3-oxo-1H-1,4-benzodiazepine-2-acetic acid and subsequent iodination using a pyridine iodine monochloride complex to give (2S)-2,3,4,5-tetrahydro-7-iodo-4-methyl-3-oxo-1H-1,4-benzodiazepine-2- acetic acid. The unreacted (R)-enantiomer of the starting ester is recovered and recycled to the racemate by treatment with sodium methoxide. The next stage describes the palladium-catalysed aminocarbonylation of the aryl iodide with 4,4′-pyridylpiperidine to give (2S)-2,3,4,5-tetrahydro-4-methyl-3-oxo-7-[[4-(4-pyridinyl)-1-piperidinyl] carbonyl]-1H-1,4-benzodiazepine-2-acetic acid dihydrate. The third stage is the hydrogenation of the pyridine subunit over palladium on charcoal to obtain the zwitterionic (2S)-7-([4,4′ -bipiperidin]-1-ylcarbonyl)-2,3,4,5-tetrahydro-4-methyl-3-oxo-1H-1, 4-benzodiazepine-2-acetic acid hexahydrate. The final stage is the formation of the hydrochloride salt to afford the drug substance.
A new synthesis of the GPIIb/IIIa receptor antagonist SB-214857-A
Andrews, Ian P,Atkins, Richard J,Badham, Neil F,Bellingham, Richard K,Breen, Gary F,Carey, John S,Etridge, Stephen K,Hayes, Jerome F,Hussain, Nigel,Morgan, David O,Share, Andrew C,Smith, Stephen A.C,Walsgrove, Timothy C,Wells, Andrew S
, p. 4915 - 4917 (2007/10/03)
A new synthesis of lotrafiban SB-214857-A is reported. The key steps are the preparation of racemic (4-methyl-3-oxo-2,3,4,5-tetrahydro-1H-benzo[e][1,4]diazepin-2-yl)-acetic acid methyl ester from 2-nitrobenzyl alcohol, a resolution using an immobilised li
