Thionyl Chloride → 5-Bromothiophene-2-carbonyl chloride
반응식
[Br:1][C:2]1[S:6][C:5]([C:7]([OH:9])=O)=[CH:4][CH:3]=1.S(Cl)([Cl:12])=O>>[Br:1][C:2]1[S:6][C:5]([C:7]([Cl:12])=[O:9])=[CH:4][CH:3]=1참가 물질
3
실험 절차
Following the procedure of Example 32, 2.07 g (10.0 mmoles) of commercially available 5-bromo-2-thiophenecarboxylic acid was reacted with 10 ml of thionyl chloride to give 2.35 g of crude 5-bromo-2-thiophenecarbonyl chloride as a red oil. The total crude acid chloride was coupled to 1.76 g (8.33 mmoles) of 5-chloro-2-oxindole-1-carboxamide by the procedure in Example 32 using 3.05 g (25.0 mmoles) of 4-(N,N-dimethylamino)pyridine and 50 ml of N,N-dimethylformamide. Acidic workup gave a solid which was recrystallized to give 1.77 g (4.43 mmoles, 53% yield) of title compound as reddish-brown crystals, m.p. 228-229° C. (tetrahydrofuran).
출처 및 근거
- ORD 기록
- ord-052628d3a1f44292a108cfaa9828f1b3
- 출처 데이터셋
- uspto-grants-2001_01
- 특허 번호
- US06174883B1
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