乙醇 → 4-Phenylcyclohexyl 4-methylbenzenesulfonate

HRID 1259467

反应方程式

HRID 1259467 反应方程式
C(O)C.[C:4]1([CH:10]2[CH2:15][CH2:14][CH:13]([OH:16])[CH2:12][CH2:11]2)[CH:9]=[CH:8][CH:7]=[CH:6][CH:5]=1.N1C=CC=CC=1.[C:23]1([CH3:33])[CH:28]=[CH:27][C:26]([S:29](Cl)(=[O:31])=[O:30])=[CH:25][CH:24]=1>C(Cl)(Cl)Cl.CCCCCC.C(OCC)(=O)C>[CH3:33][C:23]1[CH:28]=[CH:27][C:26]([S:29]([O:16][CH:13]2[CH2:12][CH2:11][CH:10]([C:4]3[CH:9]=[CH:8][CH:7]=[CH:6][CH:5]=3)[CH2:15][CH2:14]2)(=[O:31])=[O:30])=[CH:25][CH:24]=1

参与物

7

反应物 4

HCID 702乙醇HCID 1049吡啶HCID 7397对甲苯磺酰氯HCID 794974α-Phenylcyclohexan-1α-ol2 次

产物 1

HCID 135868944-Phenylcyclohexyl 4-methylbenzenesulfonate

试剂、催化剂与溶剂 2

HCID 6212三氯甲烷溶剂3 次HCID 21226206Ethyl acetate hexane溶剂

反应条件

温度
0 °C

实验过程

Commercial chloroform (Aldrich) is freed from stabilizing ethanol by passing the chloroform through a column of alumina. 4-Phenylcyclohexanol (28.3 g; 160 mmol.) is dissolved in the chloroform (150 mL) and the resulting solution is cooled in an ice bath (0° C.). Pyridine (25.3 g; 25.9 mL; 320 mmol.) is added to the solution, followed by the addition of p-toluenesulfonyl chloride (45.8 g; 240 mmol.) in small portions with constant stiffing. The reaction mixture is left overnight. TLC (hexane-ethyl acetate 15:1) shows that the starting 4-phenylcyclohexanol is consumed completely. Ether (500 mL) and water (150 mL) are added, and the organic layer is washed successively with 300 mL of 2N HCl, 5% NaHCO3, and water and then dried with Na2SO4. TLC exhibits three spots, the major one having the lowest Rf. The solvent is removed in a rotary evaporator, and the crude tosylate (70.4 g) is dissolved in 125 mL of hexane-ethylacetate (4:1) mixture upon heating and then left to crystallize in the freezer at −20° C. White product is collected and dried in vacuum, yield 40.6 g (76%), identified as 4-phenylcyclohexyl 4-methylbenzenesulfonate. TLC (hexane-ethyl acetate 15:1)—one spot, Rf=0.16. 1H NMR CDCl3, ppm): 1.2-2.2 (m, 8H, cyclohexyl), 2.46 (s, 3H, CH3), 2.48 (m, 1H, PhCH), 4.50 (m, 1H, TsOCH), 7.1-7.3 (m, 5H, Ph), 7.35 and 7.83 (two d, J=8.1 Hz, 4H, C6H4).

后处理

  1. customis consumed completely
  2. additionEther (500 mL) and water (150 mL) are added
  3. washthe organic layer is washed successively with 300 mL of 2N HCl, 5% NaHCO3, and water
  4. dry with materialdried with Na2SO4
  5. customThe solvent is removed in a rotary evaporator
  6. dissolutionthe crude tosylate (70.4 g) is dissolved in 125 mL of hexane-ethylacetate (4:1) mixture
  7. temperatureupon heating
  8. waitleft
  9. customto crystallize in the freezer at −20° C
  10. customWhite product is collected
  11. customdried in vacuum, yield 40.6 g (76%)

来源与证据

ORD记录
ord-25caabae859f4aec824b70f87958092d
来源数据集
uspto-grants-2013_06
专利号
US08466306B2

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