Hydrochloric Acid → (S)-7-Chloro-3-(pyrid-3-ylimino)-1,5,10,10a-tetrahydrothiazolo[3,4-b]isoquinoline

HRID 461818노트

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HRID 461818 반응식
N([O-])=O.[Na+].N[C:6]1[CH:7]=[CH:8][C:9]2[CH2:10][C@H:11]3[CH2:18][S:17][C:16](=[N:19][C:20]4[CH:21]=[N:22][CH:23]=[CH:24][CH:25]=4)[N:12]3[CH2:13][C:14]=2[CH:15]=1.[ClH:26]>O>[Cl:26][C:6]1[CH:7]=[CH:8][C:9]2[CH2:10][C@H:11]3[CH2:18][S:17][C:16](=[N:19][C:20]4[CH:21]=[N:22][CH:23]=[CH:24][CH:25]=4)[N:12]3[CH2:13][C:14]=2[CH:15]=1

참가 물질

5

반응물 3

HCID 313Hydrochloric Acid2회HCID 22800662(S)-7-amino-3-(pyrid-3-ylimino)-1,5,10,10a-tetrahydrothiazolo[3,4-b]isoquinolineHCID 23668193Sodium Nitrite

생성물 1

HCID 22800657(S)-7-Chloro-3-(pyrid-3-ylimino)-1,5,10,10a-tetrahydrothiazolo[3,4-b]isoquinoline

시약·촉매·용매 1

HCID 962Water용매

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온도
0 °C

실험 절차

A solution of sodium nitrite (3.1 g.) in distilled water (10 cc.) is added slowly to a solution, at 0° C., of (S)-7-amino-3-(pyrid-3-ylimino)-1,5,10,10a-tetrahydrothiazolo[3,4-b]isoquinoline (13 g.) in 4N hydrochloric acid (25 cc.). The mixture is stirred for 15 minutes at 0° C., and the solution obained is then added to a suspension of cuprous chloride (6 g.) in concentrated hydrochloric acid (d = 1.18; 25 cc.). The mixture is allowed to return to 20° C., and is then heated for 30 minutes at 70° C. After cooling to 20° C., distilled water (200 cc.), methylene chloride (250 cc.) and then N sodium hydroxide solution (100 cc.) are added. After filtration, the organic phase is recovered by decanting and is dried over magnesium sulphate, filtered and concentrated to dryness at 40° C., under reduced pressure (20 mm.Hg). The residue obtained is purified by chromatography on silica gel (200 g.) contained in a column of 3 cm. diameter, elution being carried out with methylene chloride containing 1% v/v of methanol (5,000 cc.), and 1 litre fractions being collected. Fractions 2 to 4 are combined and then concentrated to dryness. The residue obtained is recrystallised from a mixture of isopropanol (70 cc.) and heptane (100 cc.). (S)-7-Chloro-3-(pyrid-3-ylimino)-1,5,10,10a-tetrahydrothiazolo[3,4-b]isoquinoline (5.5 g.), melting at 125° C., is thus obtained.

후처리

  1. customto return to 20° C.
  2. temperatureis then heated for 30 minutes at 70° C
  3. temperatureAfter cooling to 20° C.
  4. distillationdistilled water (200 cc.), methylene chloride (250 cc.)
  5. additionN sodium hydroxide solution (100 cc.) are added
  6. filtrationAfter filtration
  7. customthe organic phase is recovered
  8. customby decanting
  9. dry with materialis dried over magnesium sulphate
  10. filtrationfiltered
  11. concentrationconcentrated to dryness at 40° C., under reduced pressure (20 mm.Hg)
  12. customThe residue obtained
  13. customis purified by chromatography on silica gel (200 g.)
  14. washdiameter, elution
  15. custombeing collected
  16. concentrationconcentrated to dryness
  17. customThe residue obtained
  18. customis recrystallised from a mixture of isopropanol (70 cc.) and heptane (100 cc.)

출처 및 근거

ORD 기록
ord-7f4e1c8d5d724e9495011ab5fb6a6374
출처 데이터셋
uspto-grants-1977_12
특허 번호
US04064247

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