Cesium carbonate → (R)-N-(5-(methylthio)pyrazin-2-yl)-4H-1'-azaspiro[oxazole-5,3'-bicyclo[2.2.2]octan]-2-amine

HRID 250084노트

반응식

HRID 250084 반응식
Cl.Cl.[NH2:3][CH2:4][C@@:5]1([OH:13])[CH:10]2[CH2:11][CH2:12][N:7]([CH2:8][CH2:9]2)[CH2:6]1.C([O-])([O-])=O.[Cs+].[Cs+].[N:20]([C:23]1[CH:28]=[N:27][C:26]([S:29][CH3:30])=[CH:25][N:24]=1)=[C:21]=S.C(N=C=NC(C)C)(C)C>CN(C)C=O>[CH3:30][S:29][C:26]1[N:27]=[CH:28][C:23]([NH:20][C:21]2[O:13][C@:5]3([CH2:4][N:3]=2)[CH:10]2[CH2:9][CH2:8][N:7]([CH2:12][CH2:11]2)[CH2:6]3)=[N:24][CH:25]=1

참가 물질

6

반응물 4

HCID 10796Cesium carbonateHCID 12734DiisopropylcarbodiimideHCID 574765802-Isothiocyanato-5-(methylthio)pyrazineHCID 66724709(S)-3-(aminomethyl)quinuclidin-3-ol dihydrochloride

생성물 1

HCID 58087960(R)-N-(5-(methylthio)pyrazin-2-yl)-4H-1'-azaspiro[oxazole-5,3'-bicyclo[2.2.2]octan]-2-amine수율 16%

시약·촉매·용매 1

HCID 6228Dimethylformamide용매

실험 절차

To (S)-3-(aminomethyl)quinuclidin-3-ol dihydrochloride (0.375 g, 1.637 mmol) in N,N-dimethylformamide (15 mL) was added Cs2CO3 (1.333 g, 4.09 mmol) and 2-isothiocyanato-5-(methylthio)pyrazine (0.3 g, 1.637 mmol),. The suspension was stirred at room temperature for 30 minutes. N,N′-diisopropylcarbodiimide (0.765 mL, 4.9 mmol) was then added and the mixture was continued to stir at room temperature for 18 hours. The mixture was concentrated and purified by silica gel chromatography (5-25% 9:1 methanol:ammonium hydroxide-ethyl acetate) to afford (R)—N-(5-(methylthio)pyrazin-2-yl)-4H-1′-azaspiro[oxazole-5,3′-bicyclo[2.2.2]octan]-2-amine (0.014 g, 0.04 mmol, 16% yield) as a yellow solid. M.P. 155-60° C. 1H NMR (400 MHz, MeOD) δ ppm 8.13 (1 H, d), 8.06 (1 H, s), 3.96 (1 H, d), 3.66 (1 H, d), 3.20 (1 H, d), 3.08 (1 H, d), 2.87-2.96 (2 H, m), 2.72-2.82 (2 H, m), 2.52 (3 H, s), 2.00-2.19 (2 H, m), 1.51-1.81 (3 H, m). LCMS R.T.=1.01; [M+H]+=306.12.

후처리

  1. stirringto stir at room temperature for 18 hours
  2. concentrationThe mixture was concentrated
  3. custompurified by silica gel chromatography (5-25% 9:1 methanol:ammonium hydroxide-ethyl acetate)

출처 및 근거

ORD 기록
ord-ceeccbbc307944eca56395ec3969156c
출처 데이터셋
uspto-grants-2011_01
특허 번호
US07863291B2

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