Formaldehyde → 4-[1-Phenyl-1-(5-(1-methylazetidin-3-yl)-1,3,4-oxadiazol-2-yl)methylene]piperidine-1-carboxylic acid tert-butyl ester

HRID 1394444Notes

Reaction equation

HRID 1394444 reaction equation
[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][C:11](=[C:14]([C:24]2[CH:29]=[CH:28][CH:27]=[CH:26][CH:25]=2)[C:15]2[O:16][C:17]([CH:20]3[CH2:23][NH:22][CH2:21]3)=[N:18][N:19]=2)[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].C=O.[BH3-][C:33]#N.[Na+].O>CO>[C:1]([O:5][C:6]([N:8]1[CH2:9][CH2:10][C:11](=[C:14]([C:24]2[CH:29]=[CH:28][CH:27]=[CH:26][CH:25]=2)[C:15]2[O:16][C:17]([CH:20]3[CH2:21][N:22]([CH3:33])[CH2:23]3)=[N:18][N:19]=2)[CH2:12][CH2:13]1)=[O:7])([CH3:4])([CH3:2])[CH3:3]

Participants

6

Reactant 4

HCID 712FormaldehydeHCID 962WaterHCID 5003444Sodium cyanoborohydrideHCID 670464414-[1-Phenyl-1-(5-(azetidin-3-yl)-1,3,4-oxadiazol-2-yl)methylene]piperidine-1-carboxylic acid tert-butyl ester

Product 1

HCID 670464244-[1-Phenyl-1-(5-(1-methylazetidin-3-yl)-1,3,4-oxadiazol-2-yl)methylene]piperidine-1-carboxylic acid tert-butyl esterYield 39.5%

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent2×

Procedure

To a solution of 4-[1-phenyl-1-(5-(azetidin-3-yl)-1,3,4-oxadiazol-2-yl)methylene]piperidine-1-carboxylic acid tert-butyl ester (0.029 g, 0.074 mmol) in MeOH (5 mL) was added formaldehyde (0.322 mL, 57% solution in H2O) dropwise at rt. A solution of NaCNBH3 (0.026 g, 0.415 mmol) in MeOH (0.3 mL) was then added and the solution was stirred at rt for 15 min. The resulting mixture was poured into H2O and extracted with EtOAc (×3), and the combined organic layers were washed (H2O, brine), dried (Na2SO4) and concentrated. The residue was purified by preparative HPLC (NH4OAc) to afford the title compound (0.012 g, 17%) as a colorless solid:

Workup

  1. extractionextracted with EtOAc (×3)
  2. washthe combined organic layers were washed (H2O, brine)
  3. dry with materialdried (Na2SO4)
  4. concentrationconcentrated
  5. customThe residue was purified by preparative HPLC (NH4OAc)

Sources & evidence

ORD record
ord-a53c8482476d46778b9413c63d5195d0
Source dataset
uspto-grants-2008_03
Patent number
US07348337B2

Reaction notes

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