Phthalimide → (R)-2-(2-methyl-4,4,4-trifluorobutyl)-1H-isoindole-1,3(2H)-dione

HRID 1198304ノート

反応式

HRID 1198304 の反応式
N(C(OCC)=O)=NC(OCC)=O.[CH3:13][C@H:14]([CH2:17][C:18]([F:21])([F:20])[F:19])[CH2:15]O.[C:22]1(=[O:32])[NH:26][C:25](=[O:27])[C:24]2=[CH:28][CH:29]=[CH:30][CH:31]=[C:23]12.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1>C(OCC)C.O1CCCC1>[CH3:13][C@H:14]([CH2:17][C:18]([F:21])([F:20])[F:19])[CH2:15][N:26]1[C:22](=[O:32])[C:23]2[C:24](=[CH:28][CH:29]=[CH:30][CH:31]=2)[C:25]1=[O:27]

参加物

7

反応物 4

HCID 6809PhthalimideHCID 11776TriphenylphosphineHCID 220568ethyl N-ethoxycarbonyliminocarbamateHCID 10351792(2R)-4,4,4-trifluoro-2-methylbutan-1-ol

生成物 1

HCID 10378474(R)-2-(2-methyl-4,4,4-trifluorobutyl)-1H-isoindole-1,3(2H)-dione収率 75%

試薬・触媒・溶媒 2

HCID 3283Diethyl Ether溶媒HCID 8028Tetrahydrofuran溶媒

実験手順

Diethyl azodicarboxylate (15.4 ml) was added to a 20 C., stirred slurry of (R)-2-methyl-4,4,4-trifluorobutan-1-ol (about 12.0 g), phthalimide (13.4 g), and triphenylphosphine (23.7 g) in diethyl ether (about 6.5 g, see above) and dry tetrahydrofuran (110 ml), warmed to room temperature overnight, and stirred an additional 8 h. The mixture was evaporated, methylene chloride was added to the residue, and the slurry was filtered. The filtrate was purified by flash chromatography, eluting with 1:1 methylene chloride:hexanes, to give (R)-2-(2-methyl-4,4,4-trifluorobutyl)-1H-isoindol-1,3(2H)-dione (17.1 g, 75%) as a white solid; m.p. 45°-47° C.; partial NMR (400 MHz, CDCl3): 1.08 (d, 3H, CH3), 1.94-2.07 (m, 1H, CF3CH2), 2.14-2.31 (m, 1H, CF3CH2), 2.36-2.50 (m, 1H, CHCH3), 3.58 (dd, 1 H, CH2N), 3.64 (dd, 1H, CH2N).

後処理

  1. customThe mixture was evaporated
  2. additionmethylene chloride was added to the residue
  3. filtrationthe slurry was filtered
  4. customThe filtrate was purified by flash chromatography
  5. washeluting with 1:1 methylene chloride

出典と根拠

ORDレコード
ord-76b41bb29dc64d898b8c2843161495e1
出典データセット
uspto-grants-1994_01
特許番号
US05280125

反応ノート

読み込み中…