Acetic Acid → HCID 53318219, compound

HRID 749725Notes

Reaction equation

HRID 749725 reaction equation
[CH2:1]([N:8]1[C:16]2[CH2:15][CH2:14][NH:13][CH2:12][C:11]=2[C:10]([C:17]2[CH:22]=[CH:21][C:20]([Cl:23])=[CH:19][CH:18]=2)=[CH:9]1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[C:24](O)(=O)[CH3:25].C(=O)C.[BH-](OC(C)=O)(OC(C)=O)OC(C)=O.[Na+]>ClCCCl.C(Cl)Cl>[CH2:1]([N:8]1[C:16]2[CH2:15][CH2:14][N:13]([CH2:24][CH3:25])[CH2:12][C:11]=2[C:10]([C:17]2[CH:18]=[CH:19][C:20]([Cl:23])=[CH:21][CH:22]=2)=[CH:9]1)[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1

Participants

7

Reactant 4

HCID 176Acetic AcidHCID 177AcetaldehydeHCID 5049666Sodium triacetoxyborohydrideHCID 53325849HCID 53325849, compound

Product 1

HCID 53318219HCID 53318219, compound

Reagents, catalysts & solvents 2

HCID 111,2-DichloroethaneSolventHCID 6344DichloromethaneSolvent

Procedure

To a solution of 1-benzyl-3-(4-chloro-phenyl)-4,5,6,7-tetrahydro-1H-pyrrolo[3,2-c]pyridine (Example 25; 0.11 g) in 1,2-dichloroethane (5 mL) was added 18 μL of acetic acid, 26 μL of acetaldehyde, and 0.10 g of NaBH(OAc)3. The mixture was stirred at RT for 15 h. The mixture was diluted with CH2Cl2 and washed with satd. aq. NaHCO3 (2×). The combined organic layers were dried over Na2SO4, filtered, and concentrated in vacuo. Chromatography on SiO2 (1% 2 M NH3 in MeOH/CH2Cl2) afforded 0.02 g of the title compound. The product was dissolved in Et2O and treated with excess 1.0 M HCl in Et2O to afford 0.02 g of the corresponding HCl salt. MS (ESI): exact mass calculated for C22H23ClN2, 350.15; found, m/z 351.2 [M+H]+, 353.2 [M+H]+. 1H NMR (500 MHz, CD3OD): 7.37-7.27 (m, 7H), 7.19-7.17 (m, 3H), 5.17-5.13 (m, 2H), 4.48-4.37 (m, 2H), 3.85-3.76 (m, 2H), 3.45-3.23 (m, 2H), 3.00-2.84 (m, 2H), 1.38 (t, J=7.1 Hz, 3H).

Workup

  1. washwashed with satd
  2. dry with materialThe combined organic layers were dried over Na2SO4
  3. filtrationfiltered
  4. concentrationconcentrated in vacuo

Sources & evidence

ORD record
ord-73f232e9047d4f29ae556427de796cf0
Source dataset
uspto-grants-2008_07
Patent number
US07402680B2

Reaction notes

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