Benzamide, o-butoxy- → Ethyl 2-n-butoxybenzimidate fluoroborate

HRID 437420

反応式

HRID 437420 の反応式
[F:1][B-:2]([F:5])([F:4])[F:3].[CH2:6]([O+](CC)CC)[CH3:7].[CH2:13]([O:17][C:18]1[CH:26]=[CH:25][CH:24]=[CH:23][C:19]=1[C:20]([NH2:22])=[O:21])[CH2:14][CH2:15][CH3:16]>C(Cl)Cl>[F:1][B-:2]([F:5])([F:4])[F:3].[CH2:13]([O:17][C:18]1[CH:26]=[CH:25][CH:24]=[CH:23][C:19]=1[C:20](=[NH:22])[O:21][CH2:6][CH3:7])[CH2:14][CH2:15][CH3:16]

参加物

4

反応物 2

HCID 43269Benzamide, o-butoxy-HCID 2723982Triethyloxonium tetrafluoroborate

生成物 1

HCID 86734869Ethyl 2-n-butoxybenzimidate fluoroborate収率 54.5%

試薬・触媒・溶媒 1

HCID 6344Dichloromethane溶媒2 回

実験手順

A solution of triethyloxonium fluoroborate (32.4 g., 0.171 mole) in methylene chloride (75 ml.) was added to a stirred solution of 2-n-butoxybenzamide [J. Pharm. Pharmacol., 4, 872 (1952)] (33.0 g., 0.171 mole) in methylene chloride (200 ml.) at 25°. The mixture was stirred at 25° for 20 hours. The solution was concentrated to about 1/15 of the original volume and then diluted with diethyl ether. The precipitated solid was recrystallized from methylene chloride-diethyl ether to give ethyl 2-n-butoxybenzimidate fluoroborate (28.7 g.), m.p. 82°-88°. To a stirred, cooled (ice-water) suspension of the fluoroborate (28.7 g.) in ethanol (75 ml.) was added 8% ethanolic ammonia (150 ml.). The mixture was stirred at 25° for 20 hours. The ethanol was removed and the residue partitioned between ether and 5N sodium hydroxide (100 ml.). The ether layer was washed with brine, dried over sodium sulfate, and then concentrated. A solution of the residual oil in ether was treated with hydrogen chloride to precipitate the title compound (16.8 g.), m.p. 150°-155°.

後処理

  1. concentrationThe solution was concentrated to about 1/15 of the original volume
  2. additiondiluted with diethyl ether
  3. customThe precipitated solid was recrystallized from methylene chloride-diethyl ether

出典と根拠

ORDレコード
ord-dcdf9877d986445d83432bd97704de0d
出典データセット
uspto-grants-1977_06
特許番号
US04031093

関連ノート

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