Sulfuric Acid → Alprazolam

HRID 867067

反応式

HRID 867067 の反応式
[Cl:1][C:2]1[CH:3]=[CH:4][C:5]2[N:11]=[C:10]([NH:12][NH2:13])[CH2:9][N:8]=[C:7]([C:14]3[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=3)[C:6]=2[CH:20]=1.[C:21]([O-])([O-])(OCC)[CH3:22].S(=O)(=O)(O)O.C(=O)(O)[O-].[Na+]>C(O)C>[Cl:1][C:2]1[CH:3]=[CH:4][C:5]2[N:11]3[C:21]([CH3:22])=[N:13][N:12]=[C:10]3[CH2:9][N:8]=[C:7]([C:14]3[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=3)[C:6]=2[CH:20]=1

参加物

6

反応物 4

HCID 1118Sulfuric AcidHCID 516892Sodium BicarbonateHCID 123908747-Chloro-2-hydrazinyl-5-phenyl-3H-1,4-benzodiazepineHCID 86598186Ethyl ortho-acetate

生成物 1

HCID 2118Alprazolam

試薬・触媒・溶媒 1

HCID 702Ethanol溶媒

実験手順

To a suspension of 2.84 parts of 7-chloro-2-hydrazino-5-phenyl-3H-1,4-benzodiazepine in a mixture of 100 parts by volume of ethanol and 5 parts by volume of ethyl orthoacetate is added 1 part of concentrated sulfuric acid with stirring. The mixture is further stirred for 30 minutes, and about 100 parts by volume of a saturated aqueous sodium bicarbonate solution is added. The mixture is concentrated under reduced pressure. The resulting crystals are collected by filtration, washed with water and dried to give 8-chloro-1-methyl-6-phenyl-4H-s-triazolo[4,3-a][1,4]benzodiazepine as colorless crystals. Recrystallization from acetone-n-hexane gives colorless needles melting at 226°-227° C.

後処理

  1. stirringThe mixture is further stirred for 30 minutes
  2. concentrationThe mixture is concentrated under reduced pressure
  3. filtrationThe resulting crystals are collected by filtration
  4. washwashed with water
  5. customdried

出典と根拠

ORDレコード
ord-7191ab0e30e746728ee43581e9355792
出典データセット
uspto-grants-1978_07
特許番号
US04102881

関連ノート

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