Acetic Acid → HCID 20285752、化合物

HRID 127746ノート

反応式

HRID 127746 の反応式
[CH3:1][C:2]1[S:3][CH:4]=[C:5]([Br:8])[C:6]=1[Br:7].C(O)(=O)C.[ClH:13].[CH2:14]=O>O>[Cl:13][CH2:1][C:2]1[S:3][C:4]([CH3:14])=[C:5]([Br:8])[C:6]=1[Br:7]

参加物

6

反応物 4

HCID 176Acetic AcidHCID 313Hydrochloric AcidHCID 712FormaldehydeHCID 128752643,4-Dibromo-2-methylthiophene

生成物 1

HCID 20285752HCID 20285752、化合物

試薬・触媒・溶媒 1

HCID 962Water溶媒

実験手順

A solution of 11.7 g. of 2-methyl-3,4-dibromo-thiophene in 30 ml. of acetic acid was added to 60 ml. of concentrated hydrochloric acid. After dropping in 4.1 g. of a 37% aqueous solution of formaldehyde the mixture was heated to 70° C. for one hour. The reaction mixture was cooled, diluted with water and extracted with ether. The combined organic phases were washed with water, sodium bicarbonate and water, dried over sodium sulfate, filtered and evaporated to give 2-chloromethyl-3,4-dibromo-5-methyl-thiophene.

後処理

  1. temperatureThe reaction mixture was cooled
  2. extractionextracted with ether
  3. washThe combined organic phases were washed with water, sodium bicarbonate and water
  4. dry with materialdried over sodium sulfate
  5. filtrationfiltered
  6. customevaporated

出典と根拠

ORDレコード
ord-fa3ac70a029e46019d21ee38fb6e724c
出典データセット
uspto-grants-1981_03
特許番号
US04256878

反応ノート

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