N-bromobutanimide → (3aR,5aR,5bR,7aR,9S,11aR,11bR,13aS)-3a-(1-hydroxy-2-oxoethyl)-1-isopropyl-5a,5b,8,8,11a-pentamethyl-2-oxo-3,3a,4,5,5a,5b,6,7,7a,8,9,10,11,11a,11b,12,13,13a-octadecahydro-2H-cyclopenta[a]chrysen-9-yl acetate

HRID 513897노트

반응식

HRID 513897 반응식
[C:1]([O:4][C@H:5]1[CH2:22][CH2:21][C@@:20]2([CH3:23])[C@@H:7]([CH2:8][CH2:9][C@:10]3([CH3:40])[C@@H:19]2[CH2:18][CH2:17][C@H:16]2[C@@:11]3([CH3:39])[CH2:12][CH2:13][C@@:14]3([CH:31]([CH:33]4SCCCS4)[OH:32])[CH2:26][C:25](=[O:27])[C:24]([CH:28]([CH3:30])[CH3:29])=[C:15]32)[C:6]1([CH3:42])[CH3:41])(=[O:3])[CH3:2].C1C(=O)N(Br)C(=[O:46])C1>C(#N)C.O>[C:1]([O:4][C@H:5]1[CH2:22][CH2:21][C@@:20]2([CH3:23])[C@@H:7]([CH2:8][CH2:9][C@:10]3([CH3:40])[C@@H:19]2[CH2:18][CH2:17][C@H:16]2[C@@:11]3([CH3:39])[CH2:12][CH2:13][C@@:14]3([CH:31]([OH:32])[CH:33]=[O:46])[CH2:26][C:25](=[O:27])[C:24]([CH:28]([CH3:30])[CH3:29])=[C:15]32)[C:6]1([CH3:42])[CH3:41])(=[O:3])[CH3:2]

참가 물질

5

반응물 2

HCID 67184N-bromobutanimideHCID 86690393(3aR,5aR,5bR,7aR,9S,11aR,11bR,13aS)-3a-((1,3-dithian-2-yl)(hydroxy)methyl)-1-isopropyl-5a,5b,8,8,11a-pentamethyl-2-oxo-3,3a,4,5,5a,5b,6,7,7a,8,9,10,11,11a,11b,12,13,13a-octadecahydro-2H-cyclopenta[a]chrysen-9-yl acetate

생성물 1

HCID 86690392(3aR,5aR,5bR,7aR,9S,11aR,11bR,13aS)-3a-(1-hydroxy-2-oxoethyl)-1-isopropyl-5a,5b,8,8,11a-pentamethyl-2-oxo-3,3a,4,5,5a,5b,6,7,7a,8,9,10,11,11a,11b,12,13,13a-octadecahydro-2H-cyclopenta[a]chrysen-9-yl acetate수율 55.7%

시약·촉매·용매 2

HCID 962Water용매HCID 6342Acetonitrile용매

실험 절차

To a solution of 103 (1.2 g, 1.945 mmol) in acetonitrile (20 ml) and water (5.00 ml) stirred in air at rt was added NBS (1.385 g, 7.78 mmol) in one charge. The reaction mixture was stirred at rt for 0.5 h, then quenched with Na2SO3 (solid), concentrated and the residue was extracted with EtOAc. The organic phase was washed with water and saturated brine, dried over sodium sulphate and concentrated in vacuo to give (3aR,5aR,5bR,7aR,9S,11aR,11bR,13aS)-3a-(1-hydroxy-2-oxoethyl)-1-isopropyl-5a,5b,8,8,11a-pentamethyl-2-oxo-3,3a,4,5,5a,5b,6,7,7a,8,9,10,11,11a,11b,12,13,13a-octadecahydro-2H-cyclopenta[a]chrysen-9-yl acetate (104) (1.09 g, 1.083 mmol, 55.7% yield) as a light yellow solid which was used without further purification.

후처리

  1. additioncharge
  2. customquenched with Na2SO3 (solid)
  3. concentrationconcentrated
  4. extractionthe residue was extracted with EtOAc
  5. washThe organic phase was washed with water and saturated brine
  6. dry with materialdried over sodium sulphate
  7. concentrationconcentrated in vacuo

출처 및 근거

ORD 기록
ord-d940aedf68b34503a24a6138c52a7638
출처 데이터셋
uspto-grants-2015_08
특허 번호
US09102685B2

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