2-Chloroethanol → 2-Methoxy-2-(trifluoromethyl)-1,3-dioxolane

HRID 1074263노트

반응식

HRID 1074263 반응식
[F:1][C:2]([F:8])([F:7])[C:3]([O:5][CH3:6])=[O:4].Cl[CH2:10][CH2:11][OH:12].CS(C)=O.[H-].[Na+]>O>[CH3:6][O:5][C:3]1([C:2]([F:8])([F:7])[F:1])[O:12][CH2:11][CH2:10][O:4]1

참가 물질

6

반응물 4

HCID 342-ChloroethanolHCID 679Dimethyl SulfoxideHCID 9893Methyl trifluoroacetateHCID 24758Sodium hydride

생성물 1

HCID 126652842-Methoxy-2-(trifluoromethyl)-1,3-dioxolane수율 63%

시약·촉매·용매 1

HCID 962Water용매

실험 절차

A mixture of 42.0 g (0.33 mol) of methyl trifluoroacetate, 26.6 g (0.33 mol) of 2-chloroethanol, and 150 mL of dimethylsulfoxide (DMSO) was stirred at 10°-20° while 15.8 g (0.33 mol) of 50% NaH in mineral oil was added portionwise. The resulting mixture was stirred at 20° for 2 h, at 25° for several days, and then poured into 1L of water. The resulting aqueous layer was extracted with 100 mL of ether. The organic layers were combined, then washed twice with water, dried over CaSO4, and distilled to give 35.6 g (63% yield) of 2-methoxy-2-trifluoromethyl-1,3-dioxolane, b.p. 60°-65° at 3.3 kPa (25 mm), and a residue containing about 4.8 g (7% yield) of by-product 2-(2-chloroethoxy)-2-trifluoromethyl-1,3-dioxolane (estimated by GC).

후처리

  1. additionwas added portionwise
  2. extractionThe resulting aqueous layer was extracted with 100 mL of ether
  3. washwashed twice with water
  4. dry with materialdried over CaSO4
  5. distillationdistilled

출처 및 근거

ORD 기록
ord-545c3ec5a39f4d61b51bcbc25ac95bea
출처 데이터셋
uspto-grants-1990_11
특허 번호
US04973714

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