5,7-Dichloroindoline → 5-Bromo-3-(5,7-dichloro-2,3-dihydro-1H-indol-1-yl)-1-(1-ethylpropyl)-2(1H)-pyrazinone

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Reaction Steps

Prepared in a similar fashion as described for Example 413 using 3,5-dibromo-1-(1-ethylpropyl)-2(1H)-pyrazinone and 5,7-dichloroindoline as the starting materials. mp 158-160° C.; 1H NMR (300 MHz, CDCl3): δ 7.18 (d, J=1.8 Hz, 1 H), 7.11 (d, J=2.2 Hz, 1 H), 6.85 (s, 1 H), 4.80-4.75 (m, 1 H), 4.34 (t, J=8.1 Hz, 2 H), 3.13 (t, J=8.1 Hz, 2 H), 1.88-1.74 (m, 2 H), 1.70-1.60 (m, 2 H), 0.88 (t, J=7.3 Hz, 6H); HRMS (ESI) calcd for C17H19N3OBrCl2 (M+H)+: 430.0089; found m/z 430.0109.

Provenance & Evidence