Bromocyclopentane → Tert-butyl 2-cyclopentyl-2-(4-methylphenyl)acetate

HRID 25153

반응식

HRID 25153 반응식
CC(C)([O-])C.[K+].[CH3:7][C:8]1[CH:13]=[CH:12][C:11]([CH2:14][C:15]([O:17][C:18]([CH3:21])([CH3:20])[CH3:19])=[O:16])=[CH:10][CH:9]=1.[CH:22]1(Br)[CH2:26][CH2:25][CH2:24][CH2:23]1>CN(C=O)C>[CH:22]1([CH:14]([C:11]2[CH:10]=[CH:9][C:8]([CH3:7])=[CH:13][CH:12]=2)[C:15]([O:17][C:18]([CH3:21])([CH3:20])[CH3:19])=[O:16])[CH2:26][CH2:25][CH2:24][CH2:23]1

참가 물질

5

반응물 3

HCID 8728BromocyclopentaneHCID 12362014tert-Butyl (4-methylphenyl)acetateHCID 23665647Potassium tert-butoxide

생성물 1

HCID 15234721Tert-butyl 2-cyclopentyl-2-(4-methylphenyl)acetate

시약·촉매·용매 1

HCID 6228Dimethylformamide용매3회

반응 조건

온도
0 °C

실험 절차

33.5 g, (0.3 mol of potassium tert-butoxide are initially introduced into 100 ml of anhydrous DMF at 0° C., and 51.6 g (0.25 mol) of the compound from Example XX in 250 ml of anhydrous DMF are added dropwise. The mixture is stirred at 0° C. for 30 min and 32.2 ml (0.3 mol) of cyclopentyl bromide in 150 ml of anhydrous DMF are added dropwise at 5-15° C. and the mixture is stirred at 25° C. for 20 h. After concentrating, the residue is partitioned between water and diethyl ether, and the ether phase is dried over sodium sulphate and concentrated. The product crystallizes out.

후처리

  1. stirringthe mixture is stirred at 25° C. for 20 h
  2. concentrationAfter concentrating
  3. customthe residue is partitioned between water and diethyl ether
  4. dry with materialthe ether phase is dried over sodium sulphate
  5. concentrationconcentrated
  6. customThe product crystallizes out

출처 및 근거

ORD 기록
ord-f849e1c730c94e5db84ce2e7ae990baa
출처 데이터셋
uspto-grants-2005_02
특허 번호
US06858622B2

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