Maleimide → 3-(4-(2-Chlorophenyl)-9-methoxy-1,3-dioxo-2,3-dihydropyrrolo[3,4-c]carbazol-6 (1H)-yl)propanenitrile

HRID 11064

Reaction equation

HRID 11064 reaction equation
[Cl:1][C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][C:3]=1/[CH:8]=[CH:9]/[C:10]1[N:11]([CH2:21][CH2:22][C:23]#[N:24])[C:12]2[C:17]([CH:18]=1)=[CH:16][C:15]([O:19][CH3:20])=[CH:14][CH:13]=2.[C:25]1(=[O:31])[NH:29][C:28](=[O:30])[CH:27]=[CH:26]1>>[Cl:1][C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][C:3]=1[C:8]1[C:27]2[C:28](=[O:30])[NH:29][C:25](=[O:31])[C:26]=2[C:18]2[C:17]3[CH:16]=[C:15]([O:19][CH3:20])[CH:14]=[CH:13][C:12]=3[N:11]([CH2:21][CH2:22][C:23]#[N:24])[C:10]=2[CH:9]=1

Participants

3

Reactant 2

HCID 10935MaleimideHCID 219807953-{2-[(E)-2-(2-Chlorophenyl)ethenyl]-5-methoxy-1H-indol-1-yl}propanenitrile

Product 1

HCID 867602003-(4-(2-Chlorophenyl)-9-methoxy-1,3-dioxo-2,3-dihydropyrrolo[3,4-c]carbazol-6 (1H)-yl)propanenitrileYield 80.2%

Procedure

Diene (236) (1.30 g, 3.86 mmol) prepared as described in example 96 was reacted with maleimide (0.49 g) following The procedure described in example 68 and then aromatized according to the procedure described in example 70 to give crude material that was chromatographed on silica eluting with ethyl acetate/hexane (1:1). Trituration from methanol gave nitrile (237) (1.33 g, 80%) as a yellow powder, mp 287–288° C. 1H NMR δ [(CD3)2SO] 11.16 (br s, 1H), 8.53 (d, J=2.6 Hz, 1H), 8.02 (s, 1H), 7.83 (d, J=9.0 Hz, 1H), 7.59 (m, 1H), 7.49 (m, 3H), 7.33 (dd, J=9.0, 2.6 Hz, 1H), 4.86 (t, J=6.7 Hz, 2H), 3.91 (s, 3H), 3.04 (t, J=6.7 Hz, 2H). Found: C, 65.32; H, 4.15; N, 9.60. C24H16ClN3O3.3/4H2O requires: C, 65.01; H, 3.98; N, 9.47.

Workup

  1. customto give crude material that
  2. customwas chromatographed on silica eluting with ethyl acetate/hexane (1:1)

Sources & evidence

ORD record
ord-8450601e0b244db8a4f671e080a931b1
Source dataset
uspto-grants-2006_08
Patent number
US07094798B1

Linked notes

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