(1S,2R)-Cyclohexane-1,2-diamine, N1-BOC protected → tert-butyl (1S,2R)-2-(6-carbamoyl-5-(4-methyl-6-propylpyridin-2-ylamino)pyridazin-3-ylamino)cyclohexylcarbamate

HRID 1396471Notes

Reaction equation

Cl[C:2]1[N:7]=[N:6][C:5]([C:8]([NH2:10])=[O:9])=[C:4]([NH:11][C:12]2[CH:17]=[C:16]([CH3:18])[CH:15]=[C:14]([CH2:19][CH2:20][CH3:21])[N:13]=2)[CH:3]=1.[NH2:22][C@@H:23]1[CH2:28][CH2:27][CH2:26][CH2:25][C@@H:24]1[NH:29][C:30](=[O:36])[O:31][C:32]([CH3:35])([CH3:34])[CH3:33]>CN1C(=O)CCC1.C(OCC)(=O)C.[Cl-].[Na+].O>[C:8]([C:5]1[N:6]=[N:7][C:2]([NH:22][C@@H:23]2[CH2:28][CH2:27][CH2:26][CH2:25][C@@H:24]2[NH:29][C:30](=[O:36])[O:31][C:32]([CH3:34])([CH3:33])[CH3:35])=[CH:3][C:4]=1[NH:11][C:12]1[CH:17]=[C:16]([CH3:18])[CH:15]=[C:14]([CH2:19][CH2:20][CH3:21])[N:13]=1)(=[O:9])[NH2:10]

Participants

Conditions

Temperature: 140 °C

Procedure

To a solution of 6-chloro-4-(4-methyl-6-propylpyridin-2-ylamino)pyridazine-3-carboxamide (134 mg, 438 μmol) in NMP (1.5 mL) was added tert-butyl (1S,2R)-2-aminocyclohexylcarbamate (376 mg, 1.75 mmol) in 3 portions approximately every 12 h over 36 h, with heating at 140° C. in the periods between additions. The mixture was then diluted with ethyl acetate and brine. The phases were separated and the organic phase washed twice with brine. The organic phase was concentrated in vacuo and then purified by chromatography (silica, 30 to 100% ethyl acetate in hexanes) to give tert-butyl (1S,2R)-2-(6-carbamoyl-5-(4-methyl-6-propylpyridin-2-ylamino)pyridazin-3-ylamino)cyclohexylcarbamate (91 mg, 188 μmol, 43%) as a light brown solid. MS (EI/CI) m/z: 484.3 [M+H].

Workup

customThe phases were separated
washthe organic phase washed twice with brine
concentrationThe organic phase was concentrated in vacuo
custompurified by chromatography (silica, 30 to 100% ethyl acetate in hexanes)

Sources & evidence

ORD record: ord-bbdd78dab214401288725c23e95f38ee
Source dataset: uspto-grants-2014_12
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08901124B2

Reaction notes

Loading…