Table 3. Substrate Scope of Disubstituted N-Heteroarenes for the Transfer Hydrogenation^a.

^aStandard conditions: a solution of 1 (0.25 mmol), TC-1 (1.0 mol %), and HCOOH (5.0 equiv) in H₂O (2.0 mL) and MeOH (2.0 mL) at room temperature under air for 12 h. Yield of the isolated product.

^bThe relative stereochemistry of the major diastereomer was determined by NMR.