Thiazole → Tert-butyl 4-hydroxy-4-(1,3-thiazol-2-yl)cyclohexanecarboxylate

HRID 410440노트

반응식

HRID 410440 반응식
C([Mg]Cl)(C)C.[Cl-].[Li+].[S:8]1[CH:12]=[CH:11][N:10]=[CH:9]1.[O:13]=[C:14]1[CH2:19][CH2:18][CH:17]([C:20]([O:22][C:23]([CH3:26])([CH3:25])[CH3:24])=[O:21])[CH2:16][CH2:15]1>C1COCC1>[OH:13][C:14]1([C:9]2[S:8][CH:12]=[CH:11][N:10]=2)[CH2:15][CH2:16][CH:17]([C:20]([O:22][C:23]([CH3:26])([CH3:25])[CH3:24])=[O:21])[CH2:18][CH2:19]1

참가 물질

5

반응물 3

HCID 9256ThiazoleHCID 14940589tert-Butyl 4-oxocyclohexane-1-carboxylateHCID 178461733HCID 178461733, 화합물

생성물 1

HCID 67257275Tert-butyl 4-hydroxy-4-(1,3-thiazol-2-yl)cyclohexanecarboxylate수율 80.5%

시약·촉매·용매 1

HCID 8028Tetrahydrofuran용매3회

실험 절차

To a flask containing THF (82 mL) was added isopropylmagnesium chloride/lithium chloride (1.2 M in THF, 37.7 mL, 45 mmol). A solution of thiazole (3.5 g, 41 mmol) in THF (20 mL) was added slowly. The reaction was stirred for one hour. A solution of tert-butyl 4-oxocyclohexanecarboxylate (12.23 g, 62 mmol) in THF (20 mL) was added and the reaction was stirred for 3 hours. The reaction was then quenched slowly with saturated ammonium chloride and diluted with ethyl acetate. The organic layer was separated, dried over magnesium sulfate, filtered and concentrated. Flash chromatography was used for purification to yield tert-butyl 4-hydroxy-4-(1,3-thiazol-2-yl)cyclohexanecarboxylate (9.25 g, 33 mmol, 79% yield). MS ESI: [M+H]+ m/z 284.1.

후처리

  1. stirringthe reaction was stirred for 3 hours
  2. customThe reaction was then quenched slowly with saturated ammonium chloride
  3. additiondiluted with ethyl acetate
  4. customThe organic layer was separated
  5. dry with materialdried over magnesium sulfate
  6. filtrationfiltered
  7. concentrationconcentrated
  8. customFlash chromatography was used for purification

출처 및 근거

ORD 기록
ord-3efb611faba1468a8551c0fdb7d85fc4
출처 데이터셋
uspto-grants-2014_06
특허 번호
US08759366B2

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