Ethyl Acetate → Ethyl 6-(2-(bis(tert-butoxycarbonyl)-amino)thiazol-5-yl)-8-phenylimidazo[1,2-a]pyridine-2-carboxylate

HRID 1958475노트

반응식

HRID 1958475 반응식
Br[C:2]1[CH:3]=[C:4]([C:16]2[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=2)[C:5]2[N:6]([CH:8]=[C:9]([C:11]([O:13][CH2:14][CH3:15])=[O:12])[N:10]=2)[CH:7]=1.[C:22]([O:26][C:27](=[O:50])[N:28]([C:43]([O:45][C:46]([CH3:49])([CH3:48])[CH3:47])=[O:44])[C:29]1[S:30][C:31](B2OC(C)(C)C(C)(C)O2)=[CH:32][N:33]=1)([CH3:25])([CH3:24])[CH3:23].[O-]P([O-])([O-])=O.[K+].[K+].[K+].C(OCC)(=O)C>C1(C)C=CC=CC=1.C(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:22]([O:26][C:27]([N:28]([C:43]([O:45][C:46]([CH3:49])([CH3:48])[CH3:47])=[O:44])[C:29]1[S:30][C:31]([C:2]2[CH:3]=[C:4]([C:16]3[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=3)[C:5]3[N:6]([CH:8]=[C:9]([C:11]([O:13][CH2:14][CH3:15])=[O:12])[N:10]=3)[CH:7]=2)=[CH:32][N:33]=1)=[O:50])([CH3:25])([CH3:24])[CH3:23]

참가 물질

8

반응물 4

HCID 8857Ethyl AcetateHCID 62657Potassium Phosphate, TribasicHCID 58208011Ethyl 6-bromo-8-phenylimidazo[1,2-a]pyridine-2-carboxylateHCID 67007586Tert-butyl (tert-butoxycarbonyl)(5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)thiazol-2-yl)carbamate

생성물 1

HCID 58207967Ethyl 6-(2-(bis(tert-butoxycarbonyl)-amino)thiazol-5-yl)-8-phenylimidazo[1,2-a]pyridine-2-carboxylate수율 17.1%

시약·촉매·용매 3

HCID 178418397HCID 178418397, 화합물촉매HCID 702Ethanol용매HCID 1140Toluene용매

반응 조건

온도
80 °C

실험 절차

A solution of ethyl 6-bromo-8-phenylimidazo[1,2-a]pyridine-2-carboxylate (0.10 g, 0.29 mmol) and tert-butyl(tert-butoxycarbonyl)(5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)thiazol-2-yl)carbamate (0.14 g, 0.33 mmol) in toluene (3 mL) and ethanol (1 mL) was bubbled nitrogen for 20 mins. The mixture was then treated with Pd(PPh3)4 (30 mg, 0.026 mmol) and K3PO4 (2 M, 1 mL, 2 mmol) and heated at 80° C. overnight. The reaction was cooled, poured into ethyl acetate (200 mL), washed with brine, separated, and concentrated. The residue was purified by column chromatography using ethyl acetate in hexanes (10-30%) as eluent. The product containing fractions were concentrated to give 28 mg (15% yield) of ethyl 6-(2-(bis(tert-butoxycarbonyl)-amino)thiazol-5-yl)-8-phenylimidazo[1,2-a]pyridine-2-carboxylate as a white solid. LCMS (Conditions C): 4.15 min (RT); (M+H)+=565.62 (100%).

후처리

  1. temperatureThe reaction was cooled
  2. washwashed with brine
  3. customseparated
  4. concentrationconcentrated
  5. customThe residue was purified by column chromatography
  6. additionThe product containing fractions
  7. concentrationwere concentrated

출처 및 근거

ORD 기록
ord-05f617e62b344e26b6b64b8443229469
출처 데이터셋
uspto-grants-2013_04
특허 번호
US08410128B2

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