Sodium Carbonate → di-tert-butyl [6'-(3,6-dihydro-2H-pyran-4-yl)dispiro[1,3-oxazole-4,4'-chromene-3',3''-oxetan]-2-yl]imidodicarbonate

HRID 873713

反応式

HRID 873713 の反応式
Br[C:2]1[CH:3]=[C:4]2[C:31](=[CH:32][CH:33]=1)[O:30][CH2:29][C:25]1([CH2:28][O:27][CH2:26]1)[C:5]12[CH2:9][O:8][C:7]([N:10]([C:18]([O:20][C:21]([CH3:24])([CH3:23])[CH3:22])=[O:19])[C:11]([O:13][C:14]([CH3:17])([CH3:16])[CH3:15])=[O:12])=[N:6]1.CC1(C)C(C)(C)OB([C:42]2[CH2:43][CH2:44][O:45][CH2:46][CH:47]=2)O1.C([O-])([O-])=O.[Na+].[Na+]>O1CCOCC1.O.Cl[Pd](Cl)([P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)[P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1>[O:45]1[CH2:44][CH:43]=[C:42]([C:2]2[CH:3]=[C:4]3[C:31](=[CH:32][CH:33]=2)[O:30][CH2:29][C:25]2([CH2:26][O:27][CH2:28]2)[C:5]23[CH2:9][O:8][C:7]([N:10]([C:18]([O:20][C:21]([CH3:24])([CH3:23])[CH3:22])=[O:19])[C:11]([O:13][C:14]([CH3:16])([CH3:15])[CH3:17])=[O:12])=[N:6]2)[CH2:47][CH2:46]1

参加物

7

反応物 3

HCID 10340Sodium CarbonateHCID 112180533,6-Dihydro-2H-pyran-4-boronic acid pinacol esterHCID 86724239Di-tert-butyl (6'-bromodispiro[1,3-oxazole-4,4'-chromene-3',3''-oxetan]-2-yl)imidodicarbonate

生成物 1

HCID 86724255di-tert-butyl [6'-(3,6-dihydro-2H-pyran-4-yl)dispiro[1,3-oxazole-4,4'-chromene-3',3''-oxetan]-2-yl]imidodicarbonate

試薬・触媒・溶媒 3

HCID 178418476HCID 178418476、化合物触媒HCID 962Water溶媒HCID 312751,4-Dioxane溶媒

反応条件

温度
100 °C

実験手順

A mixture of di-tert-butyl (6′-bromodispiro[1,3-oxazole-4,4′-chromene-3′,3″-oxetan]-2-yl)imidodicarbonate (300 mg, 0.571 mmol), 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-3,6-dihydro-2H-pyran (360 mg, 1.71 mmol), bis(triphenylphosphine)palladium(II) dichloride (40.1 mg, 0.057 mmol) and Na2CO3 (182 mg, 1.71 mmol) in dioxane (3.6 mL) and water (0.9 mL) was stirred for 1 hour at 100° C. The mixture was cooled down to ambient temperature and partitioned between EtOAc and water. The organic layer was washed with brine, dried over MgSO4, diluted with hexane, and filtered through silica gel pad (eluted with 50% EtOAc in hexane). The filtrate was concentrated at reduced pressure to give crude di-tert-butyl [6′-(3,6-dihydro-2H-pyran-4-yl)dispiro[1,3-oxazole-4,4′-chromene-3′,3″-oxetan]-2-yl]imidodicarbonate which was used for the next reaction without further purification.

後処理

  1. temperatureThe mixture was cooled down to ambient temperature
  2. custompartitioned between EtOAc and water
  3. washThe organic layer was washed with brine
  4. dry with materialdried over MgSO4
  5. additiondiluted with hexane
  6. filtrationfiltered through silica gel pad (eluted with 50% EtOAc in hexane)
  7. concentrationThe filtrate was concentrated at reduced pressure

出典と根拠

ORDレコード
ord-7881020d9c8244a58365d07c96027b5c
出典データセット
uspto-grants-2015_03
特許番号
US08975415B2

関連ノート

読み込み中…