홈MCP워크벤치Skills
홈워크벤치알림마이페이지
llms.txt · MCP 가이드개인정보처리방침 · 이용약관 · 지원v1.8.0
  1. 홈
  2. /반응

Lithium hexamethyldisilazane → 4-[2-(5-Bromo-2-chloropyridin-4-yl)acetyl]piperidine-1-carboxylic acid tert-butyl ester

HRID 872196
노트
인쇄 미리보기

반응식

HRID 872196 반응식
C[Si]([N-][Si](C)(C)C)(C)C.[Li+].[Br:11][C:12]1[C:13]([CH3:19])=[CH:14][C:15]([Cl:18])=[N:16][CH:17]=1.C([O:22][C:23]([CH:25]1[CH2:30][CH2:29][N:28]([C:31]([O:33][C:34]([CH3:37])([CH3:36])[CH3:35])=[O:32])[CH2:27][CH2:26]1)=O)C>O1CCCC1>[C:34]([O:33][C:31]([N:28]1[CH2:29][CH2:30][CH:25]([C:23](=[O:22])[CH2:19][C:13]2[C:12]([Br:11])=[CH:17][N:16]=[C:15]([Cl:18])[CH:14]=2)[CH2:26][CH2:27]1)=[O:32])([CH3:37])([CH3:36])[CH3:35]
참가 물질반응 조건실험 절차후처리출처 및 근거반응 노트

참가 물질

5

반응물 3

HCID 2733832Lithium hexamethyldisilazaneHCID 27344275-Bromo-2-chloro-4-methylpyridineHCID 27588121-Tert-butyl 4-ethyl piperidine-1,4-dicarboxylate

생성물 1

HCID 866748944-[2-(5-Bromo-2-chloropyridin-4-yl)acetyl]piperidine-1-carboxylic acid tert-butyl ester

시약·촉매·용매 1

HCID 8028Tetrahydrofuran용매2회

반응 조건

온도
-40 °C

실험 절차

Lithium bis(trimethylsilyl)amide (1.0 mol/L in tetrahydrofuran; 11.00 mL) is added dropwise to 5-bromo-2-chloro-4-picoline (0.95 g) dissolved in tetrahydrofuran (15 mL) at −40° C. under argon atmosphere. The mixture is stirred for 2 h at −35 to −45° C. prior to addition of piperidine-1,4-dicarboxylic acid 1-tert-butyl ester 4-ethyl ester (1.33 g) dissolved in tetrahydrofuran (15 mL). The reaction mixture is allowed to warm to room temperature over a period of 1 h. Ice-cold water is added and the mixture is extracted with ethyl acetate. The combined extracts are washed with brine, dried (MgSO4), and concentrated. The residue is chromatographed on silica gel (cyclohexane/ethyl acetate 75:25→60:40) to give the title compound. Mass spectrum (ESI+): m/z=417/419/421 (Cl+Br) [M+H]+.

후처리

  1. temperatureto warm to room temperature over a period of 1 h
  2. additionIce-cold water is added
  3. extractionthe mixture is extracted with ethyl acetate
  4. washThe combined extracts are washed with brine
  5. dry with materialdried (MgSO4)
  6. concentrationconcentrated
  7. customThe residue is chromatographed on silica gel (cyclohexane/ethyl acetate 75:25→60:40)

출처 및 근거

ORD 기록
ord-9de86a7215744c3287a12a5e49770470
출처 데이터셋
uspto-grants-2015_03
DOI
10.6084/m9.figshare.5104873.v1
특허 번호
US08975277B2

반응 노트

불러오는 중…

이 페이지에서참가 물질반응 조건실험 절차후처리출처 및 근거반응 노트