Scheme 27.
a) 1. AcOH, NaB(Oac)3H, DCE, rt, 3 h. 2. Toluene, 100 °C, 4.5 h. b) 1. Amine and aldehyde, DMF, rt, 2.5 h, 2. TosMIC, K2CO3, rt, 17 h. c) InCl3, (10 mol%), MeOH, 60–100 °C, 10–72 h.
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