반응 #421360

반응 방정식

1,3-dichloro-8,8-dimethyl-5,6-dihydro-8H-7-oxa-2,4,4b-triaza-fluorene

morpholine

triethylamine

→

3-Chloro-8,8-dimethyl-1-morpholin-4-yl-5,6-dihydro-8H-7-oxa-2,4,4b-triaza-fluorene

수율 40.0%

용매

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후처리

1. 1
   온도was heated
2. 2
   온도at reflux for 3 h
3. 3
   농축concentrated in vacuo
4. 4
   기타The resulting residue was purified by column chromatography (SiO2, gradient 0 to 40% ethyl acetate in cyclohexane)

실험 절차

Cesium carbonate (1.2 g, 3.7 mmol) and 1,2-dibromoethane (316 μL, 3.7 mmol) were added to a solution of 2-(2,4-dichloro-7H-pyrrolo[2,3-d]pyrimidin-6-yl)-propan-2-ol (304 mg, 1.23 mmol) in DMF (4 mL) and the reaction mixture was heated at 100° C. for 45 min, then partitioned between water and ethyl acetate. The organic extract was separated and washed with brine, then dried (Na2SO4) and concentrated in vacuo affording 1,3-dichloro-8,8-dimethyl-5,6-dihydro-8H-7-oxa-2,4,4b-triaza-fluorene. A mixture of 1,3-dichloro-8,8-dimethyl-5,6-dihydro-8H-7-oxa-2,4,4b-triaza-fluorene (1.23 mmol), morpholine (236 μL, 2.69 mmol) and triethylamine (342 μL, 2.46 mmol) in IMS (3 mL) was heated at reflux for 3 h, then concentrated in vacuo. The resulting residue was purified by column chromatography (SiO2, gradient 0 to 40% ethyl acetate in cyclohexane) affording 3-Chloro-8,8-dimethyl-1-morpholin-4-yl-5,6-dihydro-8H-7-oxa-2,4,4b-triaza-fluorene (159 mg, 40%). LCMS (method A): RT=3.13 min, [M+H]+=323.

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