Chiral amide 1 (MK-0364, taranabant) is a potent, selective, and orally bioavailable cannabinoid-1 receptor (CB-1R) inverse agonist indicated for the treatment of obesity. An asymmetric synthesis featuring a dynamic kinetic resolution via hydrogenation for the preparation of the bromo alcohol 5 is disclosed. Conversion of the alcohol intermediate to the chiral amide 1 is accomplished in good overall yield.
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Chen et al. (2007) studied this question.
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