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Potassium Carbonate → (R)-tert-butyl 4-(2-(3-cyano-4-isopropoxyphenyl)oxazol-5-yl)-2,3-dihydro-1H-inden-1-ylcarbamate

HRID 1807597
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HRID 1807597 반응식
CC1(C)C(C)(C)OB([C:9]2[CH:17]=[CH:16][CH:15]=[C:14]3[C:10]=2[CH2:11][CH2:12][C@H:13]3[NH:18][C:19](=[O:25])[O:20][C:21]([CH3:24])([CH3:23])[CH3:22])O1.Br[C:28]1[O:32][C:31]([C:33]2[CH:34]=[CH:35][C:36]([O:41][CH:42]([CH3:44])[CH3:43])=[C:37]([CH:40]=2)[C:38]#[N:39])=[N:30][CH:29]=1.C(=O)([O-])[O-].[K+].[K+].CC(O)C(O)C.O>>[C:38]([C:37]1[CH:40]=[C:33]([C:31]2[O:32][C:28]([C:9]3[CH:17]=[CH:16][CH:15]=[C:14]4[C:10]=3[CH2:11][CH2:12][C@H:13]4[NH:18][C:19](=[O:25])[O:20][C:21]([CH3:22])([CH3:23])[CH3:24])=[CH:29][N:30]=2)[CH:34]=[CH:35][C:36]=1[O:41][CH:42]([CH3:44])[CH3:43])#[N:39]
참가 물질실험 절차후처리출처 및 근거반응 노트

참가 물질

5

반응물 4

HCID 11430Potassium CarbonateHCID 583549795-(5-Bromooxazol-2-yl)-2-isopropoxybenzonitrileHCID 58355082(R)-tert-butyl 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2,3-dihydro-1H-inden-1-ylcarbamateHCID 122674143dimethylethylene glycol H2O

생성물 1

HCID 58355072(R)-tert-butyl 4-(2-(3-cyano-4-isopropoxyphenyl)oxazol-5-yl)-2,3-dihydro-1H-inden-1-ylcarbamate
수율 67%

실험 절차

Prepared using General Procedure 13. A 20 mL microwave vial was charged with (R)-tert-butyl 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2,3-dihydro-1H-inden-1-ylcarbamate INT-32 (58.4 mg, 0.16 mmol), 5-(5-bromooxazol-2-yl)-2-isopropoxybenzonitrile INT-40 (50 mg, 0.16 mmol), potassium carbonate (68 mg, 0.5 mmol) and a 3:1 mixture of dimethylethylene glycol/H2O (2 mL). The reaction mixture was degassed by bubbling N2 gas through the stirring solution for 10 min. Pd(PPh3)4 ((3.9 mg, 0.004 mmol) was added and the solution degassed for additional 2 min. The vial was subjected to microwave irradiation at 100° C. for 30 min. The solvent was removed and the residue dissolved in EA (10 mL), washed with brine, and then dried over MgSO4. The product was purified by chromatography (EA/hexanes) to afford 50 mg (67%) of (R)-tert-butyl 4-(2-(3-cyano-4-isopropoxyphenyl)oxazol-5-yl)-2,3-dihydro-1H-inden-1-ylcarbamate INT-42 as an off-white solid. LCMS-ESI (m/z) calculated for C27H29N3O4: 459.5; found 460.2 [M+H]+, tR=4.1 min. 1H NMR (400 MHz, CDCl3) δ 8.32-8.03 (m, 2H), 7.60 (dd, J=8.6, 4.1 Hz, 1H), 7.32-7.22 (m, 3H), 7.00 (d, J=8.9 Hz, 1H), 5.19 (dd, J=15.5, 7.5 Hz, 1H), 4.82-4.56 (m, 2H), 3.12 (ddd, J=16.3, 9.0, 3.5 Hz, 1H), 2.95 (dt, J=16.3, 8.1 Hz, 1H), 2.70-2.51 (m, 1H), 1.83 (dq, J=13.1, 8.2 Hz, 1H), 1.43 (s, 9H), 1.41-1.35 (m, 6H).

후처리

  1. customPrepared
  2. customThe reaction mixture was degassed
  3. customby bubbling N2 gas through the stirring solution for 10 min
  4. additionPd(PPh3)4 ((3.9 mg, 0.004 mmol) was added
  5. customthe solution degassed for additional 2 min
  6. customirradiation at 100° C. for 30 min
  7. customThe solvent was removed
  8. dissolutionthe residue dissolved in EA (10 mL)
  9. washwashed with brine
  10. dry with materialdried over MgSO4
  11. customThe product was purified by chromatography (EA/hexanes)

출처 및 근거

ORD 기록
ord-2437df2ba261424cbb51af93728d7cfb
출처 데이터셋
uspto-grants-2013_01
DOI
10.6084/m9.figshare.5104873.v1
특허 번호
US08357706B2

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