Azetidine → (S)-ethyl 2-(2-(azetidin-1-yl)-5-methyl-7-(trifluoromethylsulfonyloxy)benzo[d]thiazol-6-yl)-2-tert-butoxyacetate

HRID 510247Notes

Reaction equation

Br[C:2]1[S:3][C:4]2[C:10]([O:11][S:12]([C:15]([F:18])([F:17])[F:16])(=[O:14])=[O:13])=[C:9]([C@H:19]([O:25][C:26]([CH3:29])([CH3:28])[CH3:27])[C:20]([O:22][CH2:23][CH3:24])=[O:21])[C:8]([CH3:30])=[CH:7][C:5]=2[N:6]=1.[NH:31]1[CH2:34][CH2:33][CH2:32]1.[NH4+].[Cl-]>C1COCC1>[N:31]1([C:2]2[S:3][C:4]3[C:10]([O:11][S:12]([C:15]([F:17])([F:16])[F:18])(=[O:14])=[O:13])=[C:9]([C@H:19]([O:25][C:26]([CH3:28])([CH3:29])[CH3:27])[C:20]([O:22][CH2:23][CH3:24])=[O:21])[C:8]([CH3:30])=[CH:7][C:5]=3[N:6]=2)[CH2:34][CH2:33][CH2:32]1

Participants

Conditions

Temperature: 70 °C

Procedure

To a solution of 32 (50 mg, 0.094 mmol) in THF (1 mL) was added azetidine (20 μL). The reaction mixture was heated at 70° C. for 30 min. A saturated solution of NH4Cl (3 mL) was added, and the layers were separated. The aqueous layer was extracted with EtOAc. The combined organic layer were dried, filtered, and concentrated in vacuo. The crude material was purified by column chromatography (EtOAc/hexanes) to give 38 mg of 33. LCMS-ESI+: calc'd for C20H25F3N2O6S2: 511.1 (M+H+); Found: 511.0 (M+H+).

Workup

customthe layers were separated
extractionThe aqueous layer was extracted with EtOAc
customThe combined organic layer were dried
filtrationfiltered
concentrationconcentrated in vacuo
customThe crude material was purified by column chromatography (EtOAc/hexanes)

Sources & evidence

ORD record: ord-dd0f08d713344d37809bc1470591982d
Source dataset: uspto-grants-2015_08
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09096586B2

Reaction notes

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