Triethylamine → ethyl 4-((1R,3S)-3-(tert-butoxycarbonylamino)-2,2,3-trimethylcyclopentylamino)-3-carbamoylpyrrolo[1,2-b]pyridazine-6-carboxylate

HRID 1408983Notes

Reaction equation

[NH2:1][C@@:2]1([CH3:27])[CH2:6][CH2:5][C@@H:4]([NH:7][C:8]2[C:9]3[N:10]([CH:17]=[C:18]([C:20]([O:22][CH2:23][CH3:24])=[O:21])[CH:19]=3)[N:11]=[CH:12][C:13]=2[C:14](=[O:16])[NH2:15])[C:3]1([CH3:26])[CH3:25].CCN(CC)CC.[O:35](C(OC(C)(C)C)=O)[C:36]([O:38][C:39]([CH3:42])([CH3:41])[CH3:40])=O>C1COCC1>[C:39]([O:38][C:36]([NH:1][C@@:2]1([CH3:27])[CH2:6][CH2:5][C@@H:4]([NH:7][C:8]2[C:9]3[N:10]([CH:17]=[C:18]([C:20]([O:22][CH2:23][CH3:24])=[O:21])[CH:19]=3)[N:11]=[CH:12][C:13]=2[C:14](=[O:16])[NH2:15])[C:3]1([CH3:26])[CH3:25])=[O:35])([CH3:42])([CH3:41])[CH3:40]

Participants

Conditions

Temperature: 70 °C

Procedure

A solution of ethyl 4-((1R,3S)-3-amino-2,2,3-trimethylcyclopentylamino)-3-carbamoylpyrrolo[1,2-b]pyridazine-6-carboxylate (8.37 g, 22.42 mmol) and Et3N (6.25 mL, 44.8 mmol) in THF (100 mL) was added BOC2O (10.41 mL, 44.8 mmol), and then the reaction mixture was heated to 70° C. for 16 hrs. The reaction mixture was concentrated to afford ethyl 4-((1R,3S)-3-(tert-butoxycarbonylamino)-2,2,3-trimethylcyclopentylamino)-3-carbamoylpyrrolo[1,2-b]pyridazine-6-carboxylate. LC/MS (M+H)+=474.3.

Workup

concentrationThe reaction mixture was concentrated

Sources & evidence

ORD record: ord-1d24bdd3cc0b4e1a8ece7aa21d36be4f
Source dataset: uspto-grants-2014_12
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08921368B2

Reaction notes

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