Hydrochloric Acid → Ethyl 2-methyl-2-(piperidin-4-YL)propanoate

HRID 977161노트

반응식

HRID 977161 반응식
Cl.[CH2:2]([O:4][C:5](=[O:22])[C:6]([CH3:21])([CH3:20])[C:7]1[CH2:8][CH2:9][N:10](CC2C=CC=CC=2)[CH2:11][CH:12]=1)[CH3:3].[H][H].[OH-].[Na+]>C(O)C.O.[Pd]>[CH2:2]([O:4][C:5](=[O:22])[C:6]([CH3:21])([CH3:20])[CH:7]1[CH2:12][CH2:11][NH:10][CH2:9][CH2:8]1)[CH3:3]

참가 물질

8

반응물 4

HCID 313Hydrochloric AcidHCID 14798Sodium HydroxideHCID 545483681-Phenylmethyl-alpha,alpha-dimethyl-1,2,3,6-tetrahydro-4-pyridine-acetic acid ethyl esterHCID 178418361HCID 178418361, 화합물

생성물 1

HCID 49759624Ethyl 2-methyl-2-(piperidin-4-YL)propanoate수율 82%

시약·촉매·용매 3

HCID 23938Palladium촉매HCID 702Ethanol용매HCID 962Water용매

실험 절차

A solution of 246 g (76.6×10-2 mole) of the hydrochloride of 1-phenylmethyl-α,α-dimethyl-1,2,3,6-tetrahydro-4-pyridine-acetic acid ethyl ester in 1.5 liters of ethanol was hydrogenated in a Parr's apparatus at 50° C. at a hydrogen pressure of 3.106Pa in the presence of 20 g of 5% palladium/charcoal. After filtering, the filtrate obtained was evaporated off under reduced pressure. The residue obtained was taken up in water and rendered alkaline with 500 ml of 5N sodium hydroxide. It was extracted with ethyl acetate. The organic phase was dried over magnesium sulphate and filtered and the solvents were evaporated off under reduced pressure. 125.3 g (yield: 82%) of the desired product was obtained as an oil. n21 =1.47

후처리

  1. filtrationAfter filtering
  2. customthe filtrate obtained
  3. customwas evaporated off under reduced pressure
  4. customThe residue obtained
  5. extractionIt was extracted with ethyl acetate
  6. dry with materialThe organic phase was dried over magnesium sulphate
  7. filtrationfiltered
  8. customthe solvents were evaporated off under reduced pressure

출처 및 근거

ORD 기록
ord-073a01532a0944e0b1b5c8cc5092b470
출처 데이터셋
uspto-grants-1997_03
특허 번호
US05614534

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