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16078-32-3

1-Acetyl-3,3-dimethylindoline synthesis

8synthesis methods
-

Yield:16078-32-3 97.1%

Reaction Conditions:

with sodium hydrogencarbonate in dichloromethane at 0 - 20;

Steps:

6.3 Step 3) 1-acetyl-3,3-dimethylindoline

To a suspension of NaHC03 (5.41 g, 64.39 mmol) and 3,3-dimethylindoline (0.79 g, 5.37 mmol) in DCM (10 mL) was added acetyl chloride (0.76 mL, 10.73 mmol) dropwise at 0 °C. The reaction was stirred at rt for 2 h, then filtered. The filtrate was concentrated in vacuo to give the title compound as a white solid (0.99 g, 97.1%). MS (ESI, pos. ion) m/z: 190 [M + H]+; NMR (CDCI3) δ (ppm): 8.11 (d, 1H), 7.13 (t, 1H), 7.06 (d, 1H), 6.97 (t, 1H), 3.70 (s, 2H), 2.15 (s, 3H), 1.29 (s, 6H).

References:

WO2014/89324,2014,A1 Location in patent:Paragraph 0204