Triphenylundecylphosphonium bromide → HCID 54242059, 화합물

HRID 1756949

반응식

HRID 1756949 반응식
[Li]CCCC.[Br-].[CH2:7]([P+](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)[CH2:8][CH2:9][CH2:10][CH2:11][CH2:12][CH2:13][CH2:14][CH2:15][CH2:16][CH3:17].[CH:37]([C:39]1[CH:40]=[N:41][N:42]([CH:44]([C:50]2[CH:55]=[CH:54][CH:53]=[CH:52][CH:51]=2)[C:45]([O:47][CH2:48][CH3:49])=[O:46])[CH:43]=1)=O>C1COCC1>[CH:37]([C:39]1[CH:40]=[N:41][N:42]([CH:44]([C:50]2[CH:55]=[CH:54][CH:53]=[CH:52][CH:51]=2)[C:45]([O:47][CH2:48][CH3:49])=[O:46])[CH:43]=1)=[CH:17][CH2:16][CH2:15][CH2:14][CH2:13][CH2:12][CH2:11][CH2:10][CH2:9][CH2:8][CH3:7]

참가 물질

5

반응물 3

HCID 3085198Triphenylundecylphosphonium bromideHCID 10563150ethyl (+/-)-4-formyl-alpha-phenyl-1H-pyrazole-l-acetateHCID 178418339Butyllithium

생성물 1

HCID 54242059HCID 54242059, 화합물

시약·촉매·용매 1

HCID 8028Tetrahydrofuran용매2회

실험 절차

A solution of n-BuLi (127 mL, 254 mmol, 2.0M in hexanes) was added dropwise to a suspension of n-undecyl-triphenylphosphonium bromide (121.6 g, 244 mmol, obtained from triphenylphosphine and undecylbromide) in 500 mL THF at -78° C. under an atmosphere of N2. The resulting orange solution was stirred for 1 hour before a solution of ethyl (±)-4-formyl-α-phenyl-1H-pyrazole-1-acetate in 250 mL THF was added dropwise. Warmed to room temperature and stirred for 16 hours. Quenched by adding 150 mL water and concentrating in vacuo. The residue was partitioned between water and dichloromethane. The organic layer was dried over MgSO4, filtered, and concentrated to give an oily tan solid. Triturated with boiling hexanes and filtered to remove triphenylphosphine oxide. The filtrate was concentrated and chromatographed (10% EtOAc/hexanes on silica) to give the title compound as a yellow oil, a 1:2 E/Z mixture (44.4 g, 50%).

후처리

  1. additionwas added dropwise
  2. customQuenched
  3. additionby adding 150 mL water
  4. concentrationconcentrating in vacuo
  5. customThe residue was partitioned between water and dichloromethane
  6. dry with materialThe organic layer was dried over MgSO4
  7. filtrationfiltered
  8. concentrationconcentrated
  9. customto give an oily tan solid
  10. customTriturated with boiling hexanes
  11. filtrationfiltered
  12. customto remove triphenylphosphine oxide
  13. concentrationThe filtrate was concentrated
  14. customchromatographed (10% EtOAc/hexanes on silica)

출처 및 근거

ORD 기록
ord-c4de1ad2990442318a9ae27313a6992b
출처 데이터셋
uspto-grants-1995_08
특허 번호
US05441975

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