Cesium carbonate → (4S,5R)-5-[4-(6-Cyano-pyridin-3-yl)-phenyl]-4-fluoromethyl-2,2-dimethyl-oxazolidine-3-carboxylic acid tert-butyl ester

HRID 1487514노트

반응식

HRID 1487514 반응식
[C:1]([O:5][C:6]([N:8]1[C@H:12]([CH2:13][F:14])[C@@H:11]([C:15]2[CH:20]=[CH:19][C:18](B3OC(C)(C)C(C)(C)O3)=[CH:17][CH:16]=2)[O:10][C:9]1([CH3:31])[CH3:30])=[O:7])([CH3:4])([CH3:3])[CH3:2].C([O-])([O-])=O.[Cs+].[Cs+].Br[C:39]1[CH:40]=[CH:41][C:42]([C:45]#[N:46])=[N:43][CH:44]=1>C(COC)OC.O.O.C(OCC)(=O)C.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>[C:1]([O:5][C:6]([N:8]1[C@H:12]([CH2:13][F:14])[C@@H:11]([C:15]2[CH:16]=[CH:17][C:18]([C:39]3[CH:44]=[N:43][C:42]([C:45]#[N:46])=[CH:41][CH:40]=3)=[CH:19][CH:20]=2)[O:10][C:9]1([CH3:30])[CH3:31])=[O:7])([CH3:3])([CH3:4])[CH3:2]

참가 물질

8

반응물 3

HCID 10796Cesium carbonateHCID 8171545-Bromopyridine-2-carbonitrileHCID 58631114(4S,5R)-Rel-tert-butyl4-(fluoromethyl)-2,2-dimethyl-5-(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)oxazolidine-3-carboxylate

생성물 1

HCID 86695461(4S,5R)-5-[4-(6-Cyano-pyridin-3-yl)-phenyl]-4-fluoromethyl-2,2-dimethyl-oxazolidine-3-carboxylic acid tert-butyl ester수율 42.4%

시약·촉매·용매 4

HCID 178418397HCID 178418397, 화합물촉매HCID 962Water용매HCID 8857Ethyl Acetate용매HCID 18180031Water 1,2-dimethoxyethane용매

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온도
90 °C

실험 절차

To stirred solution of (4S,5R)-4-Fluoromethyl-2,2-dimethyl-5-[4-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-phenyl]-oxazolidine-3-carboxylic acid tert-butyl ester (0.75 g, 1.72 mmol) in dimethoxyethane:water (8:2, 10 mL) is added Cs2CO3 (1.12 g, 3.44 mmol) and 5-Bromo-pyridine-2-carbonitrile (0.347 g, 1.89 mmol). Reaction mixture is degassed with nitrogen for 30 minutes, followed by addition of Pd(PPh3)4 (0.199 g, 0.172 mmol). The resulting reaction mixture heated to 90° C. for 3 hours. Diluted with water (20 mL) and ethyl acetate (40 mL). The organic layer is separated, dried over sodium sulphate and solvent is evaporated in vacuo to get crude material purified by column chromatography eluting in 15% ethyl acetate in hexane to afford title compound (0.3 g). 1H-NMR (400 MHz, DMSO-d6): δ: 1.43 (s, 9H), 1.51 (s, 3H), 1.63 (s, 3H), 3.83-3.90 (m, 1H), 4.47-4.58 (m, 2H), 4.75-4.93 (m, 2H), 5.15 (d, 1H, J=7.2 Hz), 7.64 (d, 2H, J=8.28 Hz), 7.87 (d, 2H, J=8.24 Hz), 8.15 (d, 1H, J=8.16 Hz), 8.36 (dd, 1H, J=8.2 Hz, J=2.2 Hz), 9.12 (d, 1H, J=2.24 Hz), LC-MS (m/z): [M+H]=412.1.

후처리

  1. customReaction mixture
  2. customis degassed with nitrogen for 30 minutes
  3. customThe resulting reaction mixture
  4. customThe organic layer is separated
  5. dry with materialdried over sodium sulphate and solvent
  6. customis evaporated in vacuo
  7. customto get crude material
  8. custompurified by column chromatography
  9. washeluting in 15% ethyl acetate in hexane

출처 및 근거

ORD 기록
ord-6949048d96cf46f298f994553f39cb39
출처 데이터셋
uspto-grants-2016_08
특허 번호
US09428528B2

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