Hydrazine hydrate (1:1) → [6-chloro-5-(3,6-dihydro-2H-pyridin-1-yl)-pyridazin-3-yl]hydrazine

HRID 429743ノート

反応式

HRID 429743 の反応式
[Cl:1][C:2]1[N:3]=[N:4][C:5](Cl)=[CH:6][C:7]=1[N:8]1[CH2:13][CH:12]=[CH:11][CH2:10][CH2:9]1.O.[NH2:16][NH2:17]>O1CCOCC1>[Cl:1][C:2]1[N:3]=[N:4][C:5]([NH:16][NH2:17])=[CH:6][C:7]=1[N:8]1[CH2:13][CH:12]=[CH:11][CH2:10][CH2:9]1

参加物

4

反応物 2

HCID 24654Hydrazine hydrate (1:1)HCID 183533373,6-dichloro-4-(3,6-dihydro-2H-pyridin-1-yl)pyridazine

生成物 1

HCID 18353340[6-chloro-5-(3,6-dihydro-2H-pyridin-1-yl)-pyridazin-3-yl]hydrazine収率 88%

試薬・触媒・溶媒 1

HCID 312751,4-Dioxane溶媒2 回

実験手順

A mixture of 3,6-dichloro-4-(3,6-dihydro-2H-pyridin-1-yl)pyridazine (1.7 g, 7.4 mmol) and hydrazine hydrate (2.2 ml) in dioxan was stirred and heated at reflux under nitrogen for 24 hours. Upon cooling the dioxan was removed in vacuo and the residue was partitioned between dichloromethane and water. The aqueous was further extracted with dichloromethane (×3). The combined extracts were dried (MgSO4), filtered and evaporated. The residue was triturated with ether/MeOH and dried in vacuo to afford the title pyridazine (1.5 g, 88%). 1H NMR (250 MHz, d6-DMSO) 7.8 (1H, br s), 6.48 (1H, s), 5.76 (2H, m), 4.21 (2H, br s), 3.51 (2H, m), 3.24 (2H, m), 2.16 (2H, m). MS (ES+) 226 [MH]+, 228 [MH]+.

後処理

  1. temperatureheated
  2. temperatureat reflux under nitrogen for 24 hours
  3. customwas removed in vacuo
  4. customthe residue was partitioned between dichloromethane and water
  5. extractionThe aqueous was further extracted with dichloromethane (×3)
  6. dry with materialThe combined extracts were dried (MgSO4)
  7. filtrationfiltered
  8. customevaporated
  9. customThe residue was triturated with ether/MeOH
  10. customdried in vacuo

出典と根拠

ORDレコード
ord-6aa1386310a7485b993da535d56de599
出典データセット
uspto-grants-2001_11
特許番号
US06319924B1

反応ノート

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