Acetic Acid → HCID 70873837, compound

HRID 2208674Notes

Reaction equation

[NH2:1][C:2]1[C:3]([CH3:13])=[C:4]([CH:9]=[C:10]([Cl:12])[CH:11]=1)[C:5]([O:7][CH3:8])=[O:6].CC(O)=O.[C:18]([N:25]1[CH2:30][CH2:29][CH2:28][CH2:27][C:26]1=O)([O:20][C:21]([CH3:24])([CH3:23])[CH3:22])=[O:19].C(O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+].C([O-])(O)=O.[Na+]>C(Cl)Cl>[Cl:12][C:10]1[CH:9]=[C:4]([C:5]([O:7][CH3:8])=[O:6])[C:3]([CH3:13])=[C:2]([NH:1][CH:28]2[CH2:29][CH2:30][N:25]([C:18]([O:20][C:21]([CH3:24])([CH3:23])[CH3:22])=[O:19])[CH2:26][CH2:27]2)[CH:11]=1

Participants

Conditions

Temperature: 23 °C

Procedure

To a stirred solution of methyl 3-amino-5-chloro-2-methylbenzoate (1.40 g, 7.04 mmol) in CH2Cl2 (30 mL) and AcOH (2.50 g, 42.2 mmol) was added N-Boc piperidinone (1.96 g, 9.85 mmol) and sodium triacetoxyborohydride (4.40 g, 21.1 mmol). The reaction mixture was stirred at 23° C. for 18 hours and then saturated NaHCO3 was added and the mixture was separated. The aqueous layer was extracted with CH2Cl2 (3×20 mL) and the combined organic layers were concentrated in vacuo. The residue was purified by silica gel column chromatography (SiO2 heptane/ethylacetate=10/1 to 1/1) to give the titled compound as oil (2.40 g, 89% yield). 1H-NMR (400 MHz, CDCl3) δppm; 7.09 (s, 1H), 6.69 (s, 1H), 4.05 (m, 2H), 3.88 (s, 3H), 3.63 (m, 1H), 3.42 (m, 1H), 2.97 (m, 2H), 2.23 (s, 3H), 2.05 (m, 2H), 1.45 (s, 9H), 1.27 (m, 2H).

Workup

customthe mixture was separated
extractionThe aqueous layer was extracted with CH2Cl2 (3×20 mL)
concentrationthe combined organic layers were concentrated in vacuo
customThe residue was purified by silica gel column chromatography (SiO2 heptane/ethylacetate=10/1 to 1/1)

Sources & evidence

ORD record: ord-a803cec76c034371b6391126a92e913b
Source dataset: uspto-grants-2016_06
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09376422B2

Reaction notes

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