Hydrochloric Acid → 5,5-Dioxo-5H-5lambda~6~-thianthrene-3-carboxylic acid

HRID 614500ノート

反応式

HRID 614500 の反応式
N[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][C:3]=1[S:8]([C:11]1[CH:12]=[C:13]([CH:17]=[CH:18][C:19]=1Cl)[C:14]([OH:16])=[O:15])(=[O:10])=[O:9].Cl.N([O-])=O.[Na+].O(CC)C([S-])=[S:28].[K+].[OH-].[Na+]>O>[C:14]([C:13]1[CH:17]=[CH:18][C:19]2[S:28][C:2]3[C:3]([S:8](=[O:10])(=[O:9])[C:11]=2[CH:12]=1)=[CH:4][CH:5]=[CH:6][CH:7]=3)([OH:16])=[O:15]

参加物

7

反応物 5

HCID 313Hydrochloric AcidHCID 14798Sodium Hydroxide2 回HCID 2735045Potassium ethylxanthateHCID 203841823-(2-Aminobenzene-1-sulfonyl)-4-chlorobenzoic acidHCID 23668193Sodium Nitrite

生成物 1

HCID 203841685,5-Dioxo-5H-5lambda~6~-thianthrene-3-carboxylic acid

試薬・触媒・溶媒 1

HCID 962Water溶媒3 回

実験手順

3-(o-Aminophenylsulphonyl)-4-chlorobenzoic acid (6.00 g) was stirred with concentrated hydrochloric acid (8.0 ml) and water (12.0 ml) and treated at 0°-5° C. with a solution of sodium nitrite (1.50g) in water (30 ml) over 30 min. After a further 15 min. stirring the suspension was pipetted into a solution of potassium ethyl xanthate (10.2g) and sodium hydroxide (1.60 g) in water (50 ml) at 45°-50° C. Vigorous nitrogen evolution took place. After the addition was complete the now clear solution was heated to boiling and further sodium hydroxide (3.20 g) was added. Boiling was continued for a further 20 min., and the solution then cooled, filtered and acidified with hydrochloric acid The solid precipitated acid was filtered off, washed with water, and recrystallised from acetic acid to give 3-carboxythianthrene-5,5-dioxide, m.p. 297°-304° C; on further recrystallisation from ethanol it had m.p. 302°-305° C.

後処理

  1. additionAfter the addition
  2. temperaturewas heated
  3. waitBoiling was continued for a further 20 min.
  4. temperaturethe solution then cooled
  5. filtrationfiltered
  6. customprecipitated acid
  7. filtrationwas filtered off
  8. washwashed with water
  9. customrecrystallised from acetic acid

出典と根拠

ORDレコード
ord-e70c8830e966495c81c5115f18ffd1f6
出典データセット
uspto-grants-1979_03
特許番号
US04145350

反応ノート

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