A practical synthesis of 5-lipoxygenase inhibitor MK-0633

…, C Molinaro, C Nadeau, PD O'Shea…

Index: Gosselin, Francis; Britton, Robert A.; Davies, Ian W.; Dolman, Sarah J.; Gauvreau, Danny; Hoerrner, R. Scott; Hughes, Gregory; Janey, Jacob; Lau, Stephen; Molinaro, Carmela; Nadeau, Christian; Oshea, Paul D.; Palucki, Michael; Sidler, Rick Journal of Organic Chemistry, 2010 , vol. 75, # 12 p. 4154 - 4160

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Citation Number: 29

Abstract

Practical, chromatography-free syntheses of 5-lipoxygenase inhibitor MK-0633 p- toluenesulfonate (1) are described. The first route used an asymmetric zincate addition to ethyl 2, 2, 2-trifluoropyruvate followed by 1, 3, 4-oxadiazole formation and reductive amination as key steps. An improved second route features an inexpensive diastereomeric salt resolution of vinyl hydroxy-acid 22 followed by a robust end-game featuring a through- ...