Formaldehyde → HCID 45117639, compound

HRID 1057166

Reaction equation

HRID 1057166 reaction equation
[C:1]([BH3-])#N.[Na+].Cl.[S:6]1[C:14]2[CH2:13][CH2:12][NH:11][CH2:10][C:9]=2[CH:8]=[CH:7]1.C=O>ClCCl>[CH3:1][N:11]1[CH2:12][CH2:13][C:14]2[S:6][CH:7]=[CH:8][C:9]=2[CH2:10]1

Participants

5

Reactant 3

HCID 712FormaldehydeHCID 5003444Sodium cyanoborohydrideHCID 101763424,5,6,7-Tetrahydrothieno(3,2-c)pyridinium chloride

Product 1

HCID 45117639HCID 45117639, compoundYield 33%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

Sodium cyanoborohydride (10 g, 160 mmol) was slowly added to a mixture of 4,5,6,7-tetrahydrothieno[3,2-c]pyridine hydrochloride (7.0 g, 40.0 mmol) and formaldehyde (35% in water, 10 mL) in dichloromethane (100 mL) at room temperature. The resulting mixture was stirred at room temperature for 16 h. Work-up: the reaction mixture was partitioned between ethyl acetate (300 mL) and water (200 mL). The organic layer was separated, washed with brine (100 mL), dried over Na2SO4, and concentrated in vacuo. The residue was purified by column chromatography on silica gel (EtOAc/petroleum ether=1:5˜1:1) to afford the title compound as a white solids (2.0 g, 33%). 1H NMR (DMSO-d6, 400 MHz): δ 7.26 (d, 1H), 6.77 (d, 1H), 3.37 (s, 2H), 2.80-2.77 (m, 2H), 2.64-2.60 (m, 2H), 2.34 (s, 3H).

Workup

  1. customthe reaction mixture was partitioned between ethyl acetate (300 mL) and water (200 mL)
  2. customThe organic layer was separated
  3. washwashed with brine (100 mL)
  4. dry with materialdried over Na2SO4
  5. concentrationconcentrated in vacuo
  6. customThe residue was purified by column chromatography on silica gel (EtOAc/petroleum ether=1:5˜1:1)

Sources & evidence

ORD record
ord-a44775a76b5d412ebcf6c2f5b4c94991
Source dataset
uspto-grants-2016_07
Patent number
US09399646B2

Linked notes

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