O-(Tetrahydropyran-2-yl)hydroxylamine → HCID 87208972, compound

HRID 2046746Notes

Reaction equation

HRID 2046746 reaction equation
[CH3:1][O:2][C:3]1[CH:8]=[CH:7][C:6]([CH2:9][CH2:10][N:11]2[CH2:16][CH2:15][C:14]3([CH2:25][C:24](=[O:26])[C:23]4[C:18](=[CH:19][CH:20]=[C:21](/[CH:27]=[CH:28]/[C:29](O)=[O:30])[CH:22]=4)[O:17]3)[CH2:13][CH2:12]2)=[CH:5][CH:4]=1.[NH2:32][O:33][CH:34]1[CH2:39][CH2:38][CH2:37][CH2:36][O:35]1>C(Cl)Cl>[CH3:1][O:2][C:3]1[CH:8]=[CH:7][C:6]([CH2:9][CH2:10][N:11]2[CH2:12][CH2:13][C:14]3([CH2:25][C:24](=[O:26])[C:23]4[C:18](=[CH:19][CH:20]=[C:21](/[CH:27]=[CH:28]/[C:29]([NH:32][O:33][CH:34]5[CH2:39][CH2:38][CH2:37][CH2:36][O:35]5)=[O:30])[CH:22]=4)[O:17]3)[CH2:15][CH2:16]2)=[CH:5][CH:4]=1

Participants

4

Reactant 2

HCID 5142091O-(Tetrahydropyran-2-yl)hydroxylamineHCID 66932380HCID 66932380, compound

Product 1

HCID 87208972HCID 87208972, compound

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

(E)-3-{1′-[2-(4-Methoxy-phenyl)-ethyl]-4-oxo-spiro[chromane-2,4′-piperidine]-6-yl}-acrylic acid (165 mg, 0.360 mmol) was suspended in DCM (5 ml). TEA (0.075 ml, 0.54 mmol) was added and the clear solution was treated with NH2OTHP following the procedure described in Example 1, Step B, giving (E)-3-{1′-[2-(4-methoxy-phenyl)-ethyl]-4-oxo-spiro[chromane-2,4′-piperidine]-6-yl}-N-(tetrahydro-pyran-2-yloxy)-acrylamide (163 mg) as a yellow solid. The compound was then dissolved in DCM (5 ml) and treated with 4 M HCl in dioxane (0.5 ml, 2 mmol) as described in Example 55, Step D, giving the desired hydroxamic acid as a light yellow solid (103 mg, hydrochloride salt).

Sources & evidence

ORD record
ord-d5715be5c4984920ba6c2c9cc8eda535
Source dataset
uspto-grants-2013_11
Patent number
US08592444B2

Reaction notes

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