3-Hydrazino-6,7-dihydro-5h-benzo[6,7]cyclohepta[1,2-c]pyridazine → 1-(6,7-dihydro-5H-benzo[6,7]cyclohepta[1,2-c]pyridazin-3-yl)-N3-(4-(2-(pyrrolidin-1-yl)ethoxy)phenyl)-1H-1,2,4-triazole-3,5-diamine

HRID 1919474Notes

Reaction equation

HRID 1919474 reaction equation
[NH:1]([C:3]1[N:8]=[N:7][C:6]2[C:9]3[CH:17]=[CH:16][CH:15]=[CH:14][C:10]=3[CH2:11][CH2:12][CH2:13][C:5]=2[CH:4]=1)[NH2:2].[C:18](/[N:20]=[C:21](\OC1C=CC=CC=1)/[NH:22][C:23]1[CH:28]=[CH:27][C:26]([O:29][CH2:30][CH2:31][N:32]2[CH2:36][CH2:35][CH2:34][CH2:33]2)=[CH:25][CH:24]=1)#[N:19]>C(O)(C)C>[N:7]1[C:6]2[C:9]3[CH:17]=[CH:16][CH:15]=[CH:14][C:10]=3[CH2:11][CH2:12][CH2:13][C:5]=2[CH:4]=[C:3]([N:1]2[C:18]([NH2:19])=[N:20][C:21]([NH:22][C:23]3[CH:24]=[CH:25][C:26]([O:29][CH2:30][CH2:31][N:32]4[CH2:33][CH2:34][CH2:35][CH2:36]4)=[CH:27][CH:28]=3)=[N:2]2)[N:8]=1

Participants

4

Reactant 2

HCID 592955463-Hydrazino-6,7-dihydro-5h-benzo[6,7]cyclohepta[1,2-c]pyridazineHCID 178512285HCID 178512285, compound

Product 1

HCID 248516811-(6,7-dihydro-5H-benzo[6,7]cyclohepta[1,2-c]pyridazin-3-yl)-N3-(4-(2-(pyrrolidin-1-yl)ethoxy)phenyl)-1H-1,2,4-triazole-3,5-diamine

Reagents, catalysts & solvents 1

HCID 3776IsopropanolSolvent2×

Procedure

Diphenylcyanocarbonimidate (1.1 equiv) and 4-(2-(pyrrolidin-1-yl)ethoxy)aniline (1 equiv) were stirred in iso-propyl alcohol at ambient temperature overnight. The resulting white precipitate was filtered and washed with iso-propyl alcohol and dried to yield (Z)-phenyl N′-cyano-N-(4-(2-(pyrrolidin-1-yl)ethoxy)phenyl)carbamimidate. 3-Hydrazino-6,7-dihydro-5H-benzo[6,7]cyclohepta[1,2-c]pyridazine (82 mg, 0.36 mMol) and (Z)-phenyl N′-cyano-N-(4-(2-(pyrrolidin-1-yl)ethoxy)phenyl)carbamimidate (128 mg, 0.36 mMol) were suspended in isopropanol (3 mL) and subjected to microwave irradiation (150° C., 20 min). The precipitate which formed in the microwave vial was re-dissolved in hot isopropanol. The mixture was cooled to ambient temperature and then filtered to give 1-(6,7-dihydro-5H-benzo[6,7]cyclohepta[1,2-c]pyridazin-3-yl)-N3-(4-(2-(pyrrolidin-1-yl)ethoxy)phenyl)-1H-1,2,4-triazole-3,5-diamine, compound #1, as a yellow solid, 23 mg. 1H NMR (CDCl3, 300 MHz) 7.90 (s, 1H), 7.83 (t, 1H), 7.43 (m, 3H), 7.29 (t, 1H), 6.93 (d, 1H), 6.83 (br s, 2H), 6.39 (s, 1H), 4.17 (m, 2H), 2.98 (m, 2H), 2.60-2.80 (m, 8H), 2.32 (m, 2H), 1.87 (m, 4H) ppm; MS (ES) 483.16 (M+H).

Workup

  1. customsubjected to microwave irradiation (150° C., 20 min)
  2. customThe precipitate which formed in the microwave vial
  3. filtrationfiltered

Sources & evidence

ORD record
ord-13132ca822ae4db3864d5a5f1660826c
Source dataset
uspto-grants-2012_05
Patent number
US08168636B2

Reaction notes

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