Sodium Carbonate → Methyl 4-(4-{[(4-tert-Butylphenyl)sulfonyl]methyl}-5-methyl-1,3-oxazol-2-yl)benzoate

HRID 931429

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HRID 931429 반응식
[O-]S([O-])=O.[Na+].[Na+].C([O-])([O-])=O.[Na+].[Na+].[C:13]([C:17]1[CH:22]=[CH:21][C:20]([S:23](Cl)(=[O:25])=[O:24])=[CH:19][CH:18]=1)([CH3:16])([CH3:15])[CH3:14].Cl[CH2:28][C:29]1[N:30]=[C:31]([C:35]2[CH:44]=[CH:43][C:38]([C:39]([O:41][CH3:42])=[O:40])=[CH:37][CH:36]=2)[O:32][C:33]=1[CH3:34]>O.CCO>[C:13]([C:17]1[CH:22]=[CH:21][C:20]([S:23]([CH2:28][C:29]2[N:30]=[C:31]([C:35]3[CH:44]=[CH:43][C:38]([C:39]([O:41][CH3:42])=[O:40])=[CH:37][CH:36]=3)[O:32][C:33]=2[CH3:34])(=[O:25])=[O:24])=[CH:19][CH:18]=1)([CH3:16])([CH3:15])[CH3:14]

참가 물질

7

반응물 4

HCID 10340Sodium CarbonateHCID 24437Sodium SulfiteHCID 1398824-t-Butylbenzenesulfonyl chlorideHCID 23076573Methyl 4-(4-(chloromethyl)-5-methyloxazol-2-yl)benzoate

생성물 1

HCID 68278317Methyl 4-(4-{[(4-tert-Butylphenyl)sulfonyl]methyl}-5-methyl-1,3-oxazol-2-yl)benzoate수율 26.2%

시약·촉매·용매 2

HCID 702Ethanol용매HCID 962Water용매3회

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온도
100 °C

실험 절차

A solution of Na2SO3 (126 mg, 1.0 mmol) and Na2CO3 (106 mg, 1.0 mmol) in water (2 mL) was added to a suspension of 4-tert-butylbenzenesulfonyl chloride (233 mg, 1.0 mmol) in water (5 mL) and the mixture was stirred at 100° C. for 2 h. A solution of chloride 2 (268 mg, 1.0 mmol) in EtOH (5 mL) was added and the mixture stirred at 100° C. for 16 h. The mixture was cooled and diluted with water (40 mL) and stirred for 15 min. The precipitate was filtered, washed with water (5 mL). The residue purified by column chromatography, eluting with a gradient (20-50%) of EtOAc/pet. ether, to give benzoate 22 (112 mg, 26%) as a white powder: mp (EtOAc) 190-192° C.; 1H NMR (CDCl3) δ 8.05 (ddd, J=8.6, 1.8, 1.5 Hz, 2H, H-2, H-6), 7.89 (ddd, J=8.6, 1.8, 1.5 Hz, 2H, H-3, H-5), 7.71 (ddd, J=8.6, 2.2, 1.8 Hz, 2H, H-2′, H-6′), 7.51 (ddd, J=8.6, 2.2, 1.8 Hz, 2H, H-3′, H-5′), 4.30 (s, 2H, CH2SO2), 3.94 (s, 3H, OCH3), 2.32 (s, 3H, CH3), 1.33 [s, 9H, C(CH3)3]; MS m/z 428.5 (MH+, 100%). Anal. calcd for C23H25NO5S: C, 64.62; H, 5.89; N, 3.28. Found: C, 64.70; H, 5.94; N, 3.25%.

후처리

  1. stirringthe mixture stirred at 100° C. for 16 h
  2. temperatureThe mixture was cooled
  3. stirringstirred for 15 min
  4. filtrationThe precipitate was filtered
  5. washwashed with water (5 mL)
  6. customThe residue purified by column chromatography
  7. washeluting with a gradient (20-50%) of EtOAc/pet. ether

출처 및 근거

ORD 기록
ord-bb13505d50a347c89092de3c8ac76ee7
출처 데이터셋
uspto-grants-2016_03
특허 번호
US09296732B2

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