Phosphorus oxychloride → 6-Bromo-2-chloroquinazoline

반응식

[Br:1][C:2]1[CH:3]=[C:4]2[C:9](=[CH:10][CH:11]=1)[N:8]=[C:7](O)[N:6]=[CH:5]2.P(Cl)(Cl)([Cl:15])=O>>[Br:1][C:2]1[CH:3]=[C:4]2[C:9](=[CH:10][CH:11]=1)[N:8]=[C:7]([Cl:15])[N:6]=[CH:5]2

참가 물질

반응물 2

HCID 24813Phosphorus oxychloride

HCID 178517410HCID 178517410, 화합물

생성물 1

HCID 179135596-Bromo-2-chloroquinazoline수율 87%

실험 절차

A solution of 6-bromoquinazolin-2-ol (9.72 g, 40 mmol) in phosphorus oxychloride (100 mL) was refluxed for 5 hours. The reaction was cooled to room temperature, and most of phosphorus oxychloride was removed under reduced pressure. The residue was dropwise added to ice water (500 mL), and the resulting precipitate was collected by the filtration to give the title compound (9 g, 87%) as a yellow solid. MS (ES+) C8H3BrClFN2 requires: 260, 262, found: 261, 263 [M+H]+.

후처리

custommost of phosphorus oxychloride was removed under reduced pressure
additionThe residue was dropwise added to ice water (500 mL)
filtrationthe resulting precipitate was collected by the filtration

출처 및 근거

ORD 기록: ord-4034d431f2ba45729290c605eed1477d
출처 데이터셋: uspto-grants-2016_09
DOI: 10.6084/m9.figshare.5104873.v1
특허 번호: US09434700B2

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