Bromine → 7-bromo-6-chlorothieno[3,2-d]pyrimidin-4(3H)-one

HRID 4279ノート

反応式

HRID 4279 の反応式
[Cl:1][C:2]1[S:10][C:9]2[C:8](=[O:11])[NH:7][CH:6]=[N:5][C:4]=2[CH:3]=1.[Br:12]Br>C(O)(=O)C>[Br:12][C:3]1[C:4]2[N:5]=[CH:6][NH:7][C:8](=[O:11])[C:9]=2[S:10][C:2]=1[Cl:1]

参加物

4

反応物 2

HCID 24408BromineHCID 1355834876-chlorothieno[3,2-d]pyrimidin-4(3H)-one

生成物 1

HCID 1355834887-bromo-6-chlorothieno[3,2-d]pyrimidin-4(3H)-one収率 44%

試薬・触媒・溶媒 1

HCID 176Acetic Acid溶媒

実験手順

A solution of 1.12 g (0.006 mole) of 6-chlorothieno[3,2-d]pyrimidin-4(3H)-one and 15 ml of acetic acid at 80° C. was treated with 2.88 g (0.92 ml, 0.018 mole) of bromine. Heating was continued for 2.5 hours during which time solids precipitated. After cooling to room temperature, the mixture was filtered and washed with acetic acid, water and acetone. There was obtained 0.70 g (44%) of the title compound: m.p. above 280° C.; mass spectrum 264 (molecular ion and parent peak with expected isotope pattern), 239 (-27), 186 (some starting material) among others; 1H-nmr (trifluoroacetic acid) delta 7.5 ppm (starting material, s 0.1H), 9.3 (s, 1.0H). The nmr spectrum indicates that the reaction product is about 90% of the desired product; the remainder is starting material. This material is sufficiently pure for use in further reactions.

後処理

  1. temperatureHeating
  2. customprecipitated
  3. filtrationthe mixture was filtered
  4. washwashed with acetic acid, water and acetone

出典と根拠

ORDレコード
ord-cfc067ec972b42689c43ec1a5ef3a03e
出典データセット
uspto-grants-1988_02
特許番号
US04725599

反応ノート

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