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Phenyl isocyanate → (trans)-N-(7,8-Dihydro-7-hydroxy-6,6-dimethyl-6H-[1]benzopyrano[6,7-c][1,2,5]oxadiazol-8-yl)-N'-phenylurea

HRID 373680
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HRID 373680 반응식
[CH3:1][C:2]1([CH3:17])[O:14][C:6]2=[CH:7][C:8]3[C:9]([CH:13]=[C:5]2[CH:4]([NH2:15])[CH:3]1[OH:16])=[N:10][O:11][N:12]=3.[C:18]1([N:24]=[C:25]=[O:26])[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=1>C(O)C.C(OC(C)C)(C)C>[OH:16][C@H:3]1[C@H:4]([NH:15][C:25]([NH:24][C:18]2[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=2)=[O:26])[C:5]2=[CH:13][C:9]3[C:8]([CH:7]=[C:6]2[O:14][C:2]1([CH3:17])[CH3:1])=[N:12][O:11][N:10]=3
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참가 물질

5

반응물 2

HCID 7672Phenyl isocyanateHCID 11107308(+)-7,8-dihydro-6,6-dimethyl-7-hydroxy-8-amino-6H-pyrano[2,3-f]benz-2,1,3-oxadiazole

생성물 1

HCID 9819971(trans)-N-(7,8-Dihydro-7-hydroxy-6,6-dimethyl-6H-[1]benzopyrano[6,7-c][1,2,5]oxadiazol-8-yl)-N'-phenylurea수율 47.9%

시약·촉매·용매 2

HCID 702Ethanol용매HCID 7914Diisopropyl Ether
용매

실험 절차

To a solution of 7,8-dihydro-6,6-dimethyl-7-hydroxy-8-amino-6H-pyrano[2,3-f]benzo-2,1,3-oxadiazole (0.25 g, 1.06 mmoles) (prepared as described in part I of Example 1) in ethanol (2.5 ml) at 60° C. was added phenyl isocyanate (0.126 g, 1.06 mmoles). The reaction was heated at reflux for three hours, cooled to room temperature and diluted with isopropyl ether (5 ml). The product slowly crystallized from solution. It was collected via suction filtration and dried under vacuum to obtain 0.18 g of the desired compound as a beige solid. The residue obtained upon evaporation of the mother liquor was chromatographed on silica gel eluting with 1:1 ethyl acetate/hexane to afford an additional 0.16 g of product. The two crops were combined and triturated with isopropyl ether to obtain 0.30 g of the title compound as an off-white solid (m.p. 215°-216° C.).

후처리

  1. temperatureThe reaction was heated
  2. temperatureat reflux for three hours
  3. customThe product slowly crystallized from solution
  4. filtrationIt was collected via suction filtration
  5. customdried under vacuum

출처 및 근거

ORD 기록
ord-902cc5270e364a738f5cec5eec8abfd3
출처 데이터셋
uspto-grants-1992_11
DOI
10.6084/m9.figshare.5104873.v1
특허 번호
US05164509

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