Methane, dichloromethoxy- → 7-Fluoronaphthalene-1-carbaldehyde

HRID 434866

반응식

HRID 434866 반응식
[F:1][C:2]1[CH:11]=[CH:10][C:9]2[C:4](=[CH:5][CH:6]=[CH:7][CH:8]=2)[CH:3]=1.[CH3:12][O:13]C(Cl)Cl>[Ti](Cl)(Cl)(Cl)Cl.C(Cl)Cl>[F:1][C:2]1[CH:3]=[C:4]2[C:9]([CH:8]=[CH:7][CH:6]=[C:5]2[CH:12]=[O:13])=[CH:10][CH:11]=1

참가 물질

5

반응물 2

HCID 21004Methane, dichloromethoxy-HCID 675832-Fluoronaphthalene

생성물 1

HCID 130935627-Fluoronaphthalene-1-carbaldehyde수율 21,108.4%

시약·촉매·용매 2

HCID 24193Titanium Tetrachloride촉매HCID 6344Dichloromethane용매

실험 절차

By the method of Preparation 1, 2-fluoronaphthalene (10 g., 0.068 mmole) in 200 ml. of methylene chloride was reacted with titanium tetrachloride (25.5 g., 14.7 ml. 0.136 mole) and 1,1-dichloromethyl methyl ether (10.1 g., 0.088 mole). The resulting crude product (11 g.) was first recrystallized from hexane to yield 7-fluoro-1-naphthaldehyde [2.5 g., m.p. 95°-96° C., Rf 0.25 (1:1 chloroform:hexane)]. The mother liquor was evaporated to dryness and the residue chromatographed on 400 g. of silica gel, eluting initially with 3:1 hexane:chloroform and then with 3:2 hexane:chloroform. The column was monitored by tlc. Fractions contain clean 2-fluoro-1-naphthaldehyde [Rf 0.31 (3:2 hexane:chloroform)] were combined and evaporated to dryness, yielding purified 2-fluoro-1-naphthaldehyde (2.8 g., m.p. 60°-62° C.).

후처리

  1. customThe resulting crude product (11 g.) was first recrystallized from hexane

출처 및 근거

ORD 기록
ord-f5512cc2895647868685457de19246ad
출처 데이터셋
uspto-grants-1983_08
특허 번호
US04399296

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