Formaldehyde → HCID 86750811, compound

HRID 2305135Notes

Reaction equation

HRID 2305135 reaction equation
[C:1]([C:9]1[CH:10]=[C:11]([O:16][CH2:17][C@H:18]2[CH2:22][CH2:21][CH2:20][N:19]2[C:23](OC(C)(C)C)=O)[CH:12]=[N:13][C:14]=1[Cl:15])#[C:2][CH2:3][CH2:4][CH2:5][CH2:6][CH2:7][CH3:8].C=O>C(O)=O>[ClH:15].[ClH:15].[C:1]([C:9]1[CH:10]=[C:11]([O:16][CH2:17][C@H:18]2[CH2:22][CH2:21][CH2:20][N:19]2[CH3:23])[CH:12]=[N:13][C:14]=1[Cl:15])#[C:2][CH2:3][CH2:4][CH2:5][CH2:6][CH2:7][CH3:8]

Participants

4

Reactant 2

HCID 712FormaldehydeHCID 22872639HCID 22872639, compound

Product 1

HCID 86750811HCID 86750811, compoundYield 157%

Reagents, catalysts & solvents 1

HCID 284Formic AcidSolvent

Conditions

Temperature
70 °C

Procedure

To 5-(1-octynyl)-6-chloro-3-(1-BOC-2-(R)-pyrrolidinylmethoxy)pyridine from Example 79a (330 mg, 0.78 mmol) was added formalin (37%, 9 mL) and formic acid (4.5 mL), and the mixture was heated at 70° C. for 2 hours. The solvent was concentrated, and solid NaHCO3 was added to the residue. At pH 8 the mixture was extracted with CH2Cl2, which was dried over MgSO4 and concentrated. The residue was chromatographed on a silica gel column, eluting with CH2Cl2:MeOH 100:1-100:3 to afford to give the free base of the title compound (166.5 mg, 64% yield). MS (CI/NH3) m/z 335 (M+H)+. 1H NMR (CDCl3, 300 MHz) δ 0.92 (m, 3H), 1.32 (m, 4H), 1.48 (m, 2H), 1.62 (m, 2H), 1.80 (m, 4H), 2.02 (m, 1H), 2.30 (m, 1H), 2.45 (m, 1H), 2.47 (s, 3H), 2.66 (m, 1H), 3.12 (m, 1H), 3.93 (m, 2H), 7.27 (m, 1H), 7.98 (m, 1H). The base was converted to the salt by treatment with HCl in Et2O to give the title compound. mp 114-116° C. (dec). MS (CI/NH3) m/z 335 (M+H)+. 1H NMR (D2O, 300 MHz) δ: 1.02 (t, J=6.7 Hz, 3H), 1.43 (m, 4H), 1.58 (m, 2H), 1.71 (m, 2H), 2.06 (m, 1H), 2.21 (m, 2H), 2.42 (m, 1H), 2.56 (t, J=6.7 Hz, 2H), 3.06 (s, 3H), 3.28 (m, 1H), 3.77 (m, 1H), 3.87 (m, 1H), 4.41 (m, 2H), 7.50 (m, 1H), 8.12 (d, J=2.4 Hz, 1H). Anal. Calcd for C19H27N2OCl.1.5 HCl: C, 58.58; H, 7.37; N, 7.19. Found: C, 58.64; H, 7.39; N, 7.20. [α]25D=+8.99° (c 0.64, MeOH).

Workup

  1. concentrationThe solvent was concentrated
  2. additionsolid NaHCO3 was added to the residue
  3. extractionAt pH 8 the mixture was extracted with CH2Cl2, which
  4. dry with materialwas dried over MgSO4
  5. concentrationconcentrated
  6. customThe residue was chromatographed on a silica gel column
  7. washeluting with CH2Cl2:MeOH 100:1-100:3
  8. customto afford

Sources & evidence

ORD record
ord-cf11a2ffa3d941a9a4f4e656f939ad6c
Source dataset
uspto-grants-2002_08
Patent number
US06437138B1

Reaction notes

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