Potassium Carbonate → N-(4-(difluoromethoxy)phenyl)-6-vinylpyridazin-3-amine

HRID 77491

反応式

HRID 77491 の反応式
Cl[C:2]1[N:7]=[N:6][C:5]([NH:8][C:9]2[CH:14]=[CH:13][C:12]([O:15][CH:16]([F:18])[F:17])=[CH:11][CH:10]=2)=[CH:4][CH:3]=1.[CH:19](B1OC(C)(C)C(C)(C)O1)=[CH2:20].C([O-])([O-])=O.[K+].[K+]>O1CCOCC1.O>[F:17][CH:16]([F:18])[O:15][C:12]1[CH:13]=[CH:14][C:9]([NH:8][C:5]2[N:6]=[N:7][C:2]([CH:19]=[CH2:20])=[CH:3][CH:4]=2)=[CH:10][CH:11]=1

参加物

6

反応物 3

HCID 11430Potassium CarbonateHCID 52330122-Ethenyl-4,4,5,5-tetramethyl-1,3,2-dioxaborolaneHCID 432354486-chloro-N-(4-(difluoromethoxy)phenyl)pyridazin-3-amine

生成物 1

HCID 86679785N-(4-(difluoromethoxy)phenyl)-6-vinylpyridazin-3-amine収率 61.9%

試薬・触媒・溶媒 2

HCID 962Water溶媒HCID 312751,4-Dioxane溶媒

反応条件

温度
80 °C

実験手順

To a solution of 6-chloro-N-(4-(difluoromethoxy)phenyl)pyridazin-3-amine (0.2 g, 0.736 mmol) in dioxane and water mixture were added vinylboronic acid pinacol ester (0.146 mL, 1.104 mmol), and K2CO3 (0.305 g, 2.209 mmol). The mixture was flushed for 15 min with nitrogen. PdCl2 (dppf)-CH2Cl2 adduct (0.060 g, 0.074 mmol) was then added and the reaction mixture heated at 80° C. for 18 h. The reaction mixture was filtered through a pad of celite, washed with ethyl acetate and purified by flash chromatography on silica gel using ethyl acetate in hexane to give N-(4-(difluoromethoxy)phenyl)-6-vinylpyridazin-3-amine as a white solid (0.12 g, 59%). 1HNMR 400 MHz, DMSO-d6: δ ppm 5.47 (d, J=1.20 Hz, 1H), 6.06 (dd, J=0.80, 23.80 Hz, 1H), 6.84-7.38 (m, 5H), 7.75-7.82 (m, 3H), 9.42 (s, 1H).

後処理

  1. customThe mixture was flushed for 15 min with nitrogen
  2. filtrationThe reaction mixture was filtered through a pad of celite
  3. washwashed with ethyl acetate
  4. custompurified by flash chromatography on silica gel

出典と根拠

ORDレコード
ord-70a27a3b47514ec89815ce94e3d224e7
出典データセット
uspto-grants-2014_09
特許番号
US08841301B2

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