Sodium Iodide → 3-[6-(Azetidine-1-carbonyl)pyridin-3-yl]oxy-5-[(3R)-1-cyclopropyl-2-oxo-pyrrolidin-3-yl]oxy-N-(5-methylpyrazin-2-yl)benzamide

HRID 600520Notes

Reaction equation

[N:1]1([C:5]([C:7]2[N:12]=[CH:11][C:10]([O:13][C:14]3[CH:15]=[C:16]([CH:31]=[C:32]([C:34](=[O:43])[NH:35][C:36]4[CH:41]=[N:40][C:39]([CH3:42])=[CH:38][N:37]=4)[CH:33]=3)[O:17][CH:18]([CH2:24][CH2:25]OS(C)(=O)=O)[C:19](OCC)=[O:20])=[CH:9][CH:8]=2)=[O:6])[CH2:4][CH2:3][CH2:2]1.[Na+].[I-].[CH:46]1([NH2:49])[CH2:48][CH2:47]1>C(#N)C>[N:1]1([C:5]([C:7]2[N:12]=[CH:11][C:10]([O:13][C:14]3[CH:33]=[C:32]([CH:31]=[C:16]([O:17][C@@H:18]4[CH2:24][CH2:25][N:49]([CH:46]5[CH2:48][CH2:47]5)[C:19]4=[O:20])[CH:15]=3)[C:34]([NH:35][C:36]3[CH:41]=[N:40][C:39]([CH3:42])=[CH:38][N:37]=3)=[O:43])=[CH:9][CH:8]=2)=[O:6])[CH2:4][CH2:3][CH2:2]1

Participants

Conditions

Temperature: 120 °C

Procedure

To a solution of ethyl 2-[3-[6-(azetidine-1-carbonyl)pyridin-3-yl]oxy-5-[(5-methylpyrazin-2-yl)carbamoyl]phenoxy]-4-methylsulfonyloxy-butanoate (Intermediate 27) (250 mg, 0.41 mmol) in acetonitrile (5 mL), was added NaI (62 mg, 0.41 mmol) and cyclopropylamine (56 μL, 0.81 mmol). The resulting mixture was heated in a microwave at 120° C. for 60 minutes. The solvent was evaporated under reduced pressure and the residue purified by flash chromatography eluting with 0-40% methanol in DCM to afford the racemic product (91 mg, 42%). 3-[6-(Azetidine-1-carbonyl)pyridin-3-yl]oxy-5-[(3R)-1-cyclopropyl-2-oxo-pyrrolidin-3-yl]oxy-N-(5-methylpyrazin-2-yl)benzamide was separated from its enantiomer by chiral HPLC using a Merck 50 mm 20 μm Chiralcel OJ column eluting with methanol at a flow rate of 60 mL/min. 91 mg of racemic material was separated in 1 injection of 5 mL at 18 mg/ml in methanol to afford the product which eluted before its enantiomer (27 mg, 12%). 1H NMR δ (300 MHz, CDCl3) 0.66-0.91 (m, 4H), 2.14 (sextet, 1H), 2.35 (quintet, 2H), 2.48-2.62 (m, 4H), 2.66-2.78 (m, 1H), 3.27-3.49 (m, 2H), 4.25 (t, 2H), 4.70 (t, 2H), 4.92 (t, 1H), 6.96 (s, 1H), 7.22 (s, 1H), 7.38 (d, 1H), 7.45 (s, 1H), 8.11 (d, 1H), 8.13 (s, 1H), 8.33 (s, 1H), 8.57 (s, 1H), 9.51 (s, 1H); m/z 529 (M+H)+.

Workup

customThe solvent was evaporated under reduced pressure
customthe residue purified by flash chromatography
washeluting with 0-40% methanol in DCM

Sources & evidence

ORD record: ord-9a303c0cd6d64ebf8f75216c5fa544ce
Source dataset: uspto-grants-2011_03
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07902200B2

Reaction notes

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