1,3-Butadiene → 2,6-Dimethylnaphthalene

HRID 617625

反応式

HRID 617625 の反応式
[CH3:1][C:2]1[C:7]2[CH:8]=CC=C(C)[C:6]=2[CH:5]=[CH:4][CH:3]=1.[CH2:13]=[CH:14][CH:15]=[CH2:16]>CC1C=CC=CC=1C>[CH3:13][C:14]1[CH:6]=[CH:5][C:4]2[CH:3]=[C:2]([CH3:1])[CH:7]=[CH:8][C:16]=2[CH:15]=1

参加物

4

反応物 2

HCID 78451,3-ButadieneHCID 113061,5-Dimethylnaphthalene2 回

生成物 1

HCID 113872,6-Dimethylnaphthalene

試薬・触媒・溶媒 1

HCID 7237O-Xylene溶媒

実験手順

The present inventors synthesized 1,5-DMN from o-xylene and butadiene as the starting raw materials and isomerized the resultant 1,5-DMN to obtain the mixture of isomers consisting essentially of 1,5-, 1,6- and 2,6-DMNs, which was cooled as it is to precipitate 2,6-DMN crystal in the form of scale. The crystal thus obtained was poor in the efficiency of separation from the mother liquor at the time of filtration, whereby it was difficult to obtain highly pure 2,6-DMN. As is the case with the foregoing, 2,6-DMN crystal in the form of scale was obtained from the mixture of isomers containing 2,7-, 1,7-DMN, etc. other than 1,5-, 1,6- and 2,6-DMN as the starting raw material for crystallization, but it was extremely poor in filtration efficiency.

後処理

  1. customto obtain
  2. additionthe mixture of isomers
  3. temperature2,6-DMNs, which was cooled as it
  4. customto precipitate 2,6-DMN crystal in the form of scale
  5. customThe crystal thus obtained
  6. customwas poor in the efficiency of separation from the mother liquor at the time of filtration, whereby it

出典と根拠

ORDレコード
ord-a4e82ec4219f4f7aa3863c06354f3ddf
出典データセット
uspto-grants-1999_09
特許番号
US05948949

関連ノート

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