Formaldehyde → US9777003, Example 207

Reaction equation

[CH2:1]([N:8]1[C:12]2[CH:13]=[C:14]([NH:21][CH:22]3[CH2:27][CH2:26][NH:25][CH2:24][CH2:23]3)[C:15]3[N:16]([C:17]([CH3:20])=[N:18][N:19]=3)[C:11]=2[CH:10]=[C:9]1[CH3:28])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.C=O.[BH-](OC(C)=O)(OC(C)=O)O[C:33](C)=O.[Na+]>C(Cl)Cl>[CH2:1]([N:8]1[C:12]2[CH:13]=[C:14]([NH:21][CH:22]3[CH2:27][CH2:26][N:25]([CH3:33])[CH2:24][CH2:23]3)[C:15]3[N:16]([C:17]([CH3:20])=[N:18][N:19]=3)[C:11]=2[CH:10]=[C:9]1[CH3:28])[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1

Participants

Procedure

To a mixture of 6-benzyl-1,7-dimethyl-N-piperidin-4-yl-6H-pyrrolo[2,3-e][1,2,4]triazolo[4,3-a]pyridin-4-amine (50. mg, 0.13 mmol, from Example 206) and formaldehyde (37 wt % solution in water, 12 mg, 0.15 mmol, Aldrich) in DCM (2.6 mL) was added Na(OAc)3BH (42 mg, 0.20 mmol, Aldrich). After 25 minutes, volatile solvent was removed in vacuo. The mixture was diluted with water and methanol, and the product was purified via preparative HPLC-MS (Waters XBridge C18, eluting with a gradient of MeCN/H2O containing 0.15% NH4OH). Yield: (24.8 mg, 49%).