Bromoacetonitrile → (R)-tert-butyl 3-((R)-(3-chloro-5-fluorophenyl)(cyanomethoxy)methyl)piperidine-1-carboxylate

HRID 451940노트

반응식

HRID 451940 반응식
[Cl:1][C:2]1[CH:3]=[C:4]([C@H:9]([OH:23])[C@@H:10]2[CH2:15][CH2:14][CH2:13][N:12]([C:16]([O:18][C:19]([CH3:22])([CH3:21])[CH3:20])=[O:17])[CH2:11]2)[CH:5]=[C:6]([F:8])[CH:7]=1.[H-].[Na+].Br[CH2:27][C:28]#[N:29]>C(#N)C>[Cl:1][C:2]1[CH:3]=[C:4]([C@H:9]([O:23][CH2:27][C:28]#[N:29])[C@@H:10]2[CH2:15][CH2:14][CH2:13][N:12]([C:16]([O:18][C:19]([CH3:20])([CH3:22])[CH3:21])=[O:17])[CH2:11]2)[CH:5]=[C:6]([F:8])[CH:7]=1

참가 물질

5

반응물 3

HCID 11534Bromoacetonitrile2회HCID 24758Sodium hydride2회HCID 58017388(R)-tert-butyl 3-((R)-(3-chloro-5-fluorophenyl)(hydroxy)methyl)piperidine-1-carboxylate

생성물 1

HCID 67365681(R)-tert-butyl 3-((R)-(3-chloro-5-fluorophenyl)(cyanomethoxy)methyl)piperidine-1-carboxylate수율 150.7%

시약·촉매·용매 1

HCID 6342Acetonitrile용매

실험 절차

A solution of (R)-tert-butyl 3-((R)-(3-chloro-5-fluorophenyl)(hydroxy)methyl)piperidine-1-carboxylate (55 g, 0.156 mol) in acetonitrile (1.2 L) was cooled to 0° C., NaH (19.2 g, 0.48 mol, 60% in oil) was added in portions, then the mixture was stirred at rt for 1 hr. The mixture was cooled to −20° C. and bromoacetonitrile (57.7 g, 0.48 mol) was added dropwise. After 0.5 hr, additional NaH (19.2 g, 0.48 mol, 60% in oil) and bromoacetonitrile (57.7 g, 0.48 mol) was added. TLC showed 80% of the starting material was reacted. The reaction was quenched with saturated NH4Cl solution (200 mL), water (1 L) was added. Acetonitrile was removed by reduced pressure, CH2Cl2 (1 L) was added, the aqueous layer was back extracted with CH2Cl2 (3×500 mL), dried over Na2SO4 and concentrated in vacuo to give the crude (R)-tert-butyl 3-((R)-(3-chloro-5-fluorophenyl)(cyanomethoxy)methyl)piperidine-1-carboxylate (90 g), which was used for the next step without further purification.

후처리

  1. temperatureThe mixture was cooled to −20° C.
  2. waitAfter 0.5 hr
  3. customwas reacted
  4. customThe reaction was quenched with saturated NH4Cl solution (200 mL), water (1 L)
  5. additionwas added
  6. customAcetonitrile was removed by reduced pressure, CH2Cl2 (1 L)
  7. additionwas added
  8. extractionthe aqueous layer was back extracted with CH2Cl2 (3×500 mL)
  9. dry with materialdried over Na2SO4
  10. concentrationconcentrated in vacuo

출처 및 근거

ORD 기록
ord-ce89c98393924b4f8365a36114cbb090
출처 데이터셋
uspto-grants-2013_07
특허 번호
US08487108B2

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