Cesium carbonate → 5-(4-((1R,2S)-2-amino-3-fluoro-1-hydroxypropyl)-phenyl)picolinonitrile

HRID 1520432Notes

Reaction equation

CC1(C)C(C)(C)OB([C:9]2[CH:10]=[CH:11][C:12]([C:15]#[N:16])=[N:13][CH:14]=2)O1.[NH2:18][C@H:19]([CH2:29][F:30])[C@@H:20]([C:22]1[CH:27]=[CH:26][C:25](I)=[CH:24][CH:23]=1)[OH:21].C([O-])([O-])=O.[Cs+].[Cs+]>C(COC)OC.O.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[NH2:18][C@H:19]([CH2:29][F:30])[C@@H:20]([C:22]1[CH:23]=[CH:24][C:25]([C:9]2[CH:10]=[CH:11][C:12]([C:15]#[N:16])=[N:13][CH:14]=2)=[CH:26][CH:27]=1)[OH:21]

Participants

Conditions

Temperature: 90 °C

Procedure

To a solution of commercially available 5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)picolinonitrile (0.5 g, 2.17 mmol) in degassed dimethoxyethane (10 mL) and water (3 mL) is added (1R,2S)-2-amino-3-fluoro-1-(4-iodophenyl)-propan-1-ol (0.65 g, 2.20 mmol) and Cs2CO3 (2.15 g, 6.6 mmol). Pd(PPh3)4 (0.25 g, 0.21 mmol) is added and the reaction mixture heated to 90° C. for 1.5 hours. Solvent is evaporated in vacuo and the crude material purified by column chromatography on silica gel eluting in methanol/CHCl3 to afford the title compound (206 mg): 1NMR (400 MHz, CDCl3) δ: 3.09-3.18 (m, 1H), 3.48 (s, 1H), 4.24-4.28 (m, 0.5H), 4.36-4.41 (m, 1H), 4.49-4.52 (m, 0.5H), 4.64 (d, J=6.16 Hz, 1H), 7.53 (d, J=8.16 Hz, 2H), 7.59 (d, J=8.24 Hz, 2H), 7.76 (d, J=8.2, 1 H), 8.0 (dd, J1=8.16 Hz, J2=2.32 Hz, 1H), 8.93 (d, J=1.76 Hz, 1H). m/z (Cl) 272 [M+H].

Workup

customSolvent is evaporated in vacuo
customthe crude material purified by column chromatography on silica gel eluting in methanol/CHCl3

Sources & evidence

ORD record: ord-d24fc590d78c4a8b81303a0786a72547
Source dataset: uspto-grants-2015_07
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09073894B2

Reaction notes

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