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- W2201437354 abstract "An efficient and robust process for the asymmetric hydrogenation of a key intermediate of Montelukast using the highly efficient and selective chiral spiro catalyst Ir/SpiroPAP is reported. The developed process was conducted at mild reaction temperature (30 °C) under a hydrogen pressure of 20 atm with low catalyst loading (S/C = 30 000) and afforded the desired chiral alcohol intermediate in 99.5% ee. This process currently has been carried out at 30 kg scale. The process-related impurities (impurities I–V) were also identified, synthesized, and characterized by LC-MS and NMR techniques." @default.
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- W2201437354 date "2015-12-21" @default.
- W2201437354 modified "2023-09-27" @default.
- W2201437354 title "Ir/SpiroPAP Catalyzed Asymmetric Hydrogenation of a Key Intermediate of Montelukast: Process Development and Potential Impurities Study" @default.
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- W2201437354 doi "https://doi.org/10.1021/acs.oprd.5b00339" @default.
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