Lithium hydride → HCID 178522542、化合物

HRID 1732888ノート

反応式

HRID 1732888 の反応式
I.[NH:2]=[C:3]1[NH:7][CH2:6][CH2:5][NH:4]1.[H-].[Li+].[Br:10][C:11]1[CH:16]=[CH:15][CH:14]=[C:13]([Br:17])[C:12]=1[N:18]=[C:19]=[O:20]>CN(C)C=O>[Br:10][C:11]1[CH:16]=[CH:15][CH:14]=[C:13]([Br:17])[C:12]=1[NH:18][C:19]([N:2]=[C:3]1[NH:7][CH2:6][CH2:5][NH:4]1)=[O:20]

参加物

5

反応物 3

HCID 62714Lithium hydrideHCID 202306671,3-Dibromo-2-isocyanatobenzeneHCID 178506595HCID 178506595、化合物

生成物 1

HCID 178522542HCID 178522542、化合物

試薬・触媒・溶媒 1

HCID 6228Dimethylformamide溶媒3 回

実験手順

In a manner similar to that described in Examples II and III, a solution of 12.0 grams (0.0563 mole) of 2-iminoimidazolidine hydroiodide in 50 milliliters of dry dimethylformamide is added dropwise with cooling and under an atmosphere of nitrogen to a suspension of 447 milligrams (0.0563 mole) of lithium hydride in 50 milliliters of dry dimethylformamide. After completion of the addition the mixture is allowed to warm to room temperature over a period of about half an hour, then cooled to 0°-5° C., and a solution of 7.8 grams (0.0282 mole) of 2,6-dibromophenyl isocyanate in 25 milliliters of dry dimethylformamide is added dropwise over a two hour period while maintaining the cooled temperature range. The mixture is then allowed to warm to room temperature and stirred overnight under nitrogen to obtain the desired N-(2,6-dibromophenyl)-N'-(2-imidazolidinylidene)urea product in the reaction mixture. The product is recovered from the reaction mixture by pouring the mixture into 400 milliliters of ice water, acidifying with 10 percent hydrochloric acid to pH below 3, filtering to remove impurities, saturating the filtrate with solid sodium chloride and basifying with potassium carbonate to a pH of 8-9 to precipate the N-(2,6-dibromophenyl)-N'-(2-imidazolidinylidene)urea product as a white solid, m.p. 185°-190° C. (dec.)

後処理

  1. additionAfter completion of the addition the mixture
  2. temperaturecooled to 0°-5° C.
  3. temperaturewhile maintaining the cooled temperature range
  4. temperatureto warm to room temperature

出典と根拠

ORDレコード
ord-c695718f64c7448390b933a9d357e33f
出典データセット
uspto-grants-1980_12
特許番号
US04239768

反応ノート

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