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Five glutarimide alkaloids cordiarimide A (5), cordiarimide B (6), crotonimide A (3), crotonimide B (4), and julocrotine (2) have been synthesized starting from Boc-L-glutamine (7). The benzylic alcohol chiral centre of cordiarimides B (6) has been established in 6 : 1 diastereoselectivity by catalytic asymmetric hydrogenation using Zhou's catalytic system Pd(CF(3)CO(2))(2)/(R,R)-Me-DuPhos. ; National Natural Science Foundation of China[20832005]; National Basic Research Program (973 Program) of China[2010CB833200]