Sodium Carbonate → 2-Amino-5-[2-(3,4-dimethoxy-phenyl)-imidazo[2,1-b][1,3,4]thiadiazol-5-yl]-nicotinonitrile

HRID 2409554ノート

反応式

HRID 2409554 の反応式
[CH3:1][O:2][C:3]1[CH:4]=[C:5]([C:11]2[S:15][C:14]3=[N:16][CH:17]=[C:18](I)[N:13]3[N:12]=2)[CH:6]=[CH:7][C:8]=1[O:9][CH3:10].[NH2:20][C:21]1[N:28]=[CH:27][C:26](B2OC(C)(C)C(C)(C)O2)=[CH:25][C:22]=1[C:23]#[N:24].C([O-])([O-])=O.[Na+].[Na+]>O1CCOCC1>[NH2:20][C:21]1[N:28]=[CH:27][C:26]([C:18]2[N:13]3[C:14]([S:15][C:11]([C:5]4[CH:6]=[CH:7][C:8]([O:9][CH3:10])=[C:3]([O:2][CH3:1])[CH:4]=4)=[N:12]3)=[N:16][CH:17]=2)=[CH:25][C:22]=1[C:23]#[N:24]

参加物

5

反応物 3

HCID 10340Sodium CarbonateHCID 667169462-(3,4-Dimethoxy-phenyl)-5-iodo-imidazo[2,1-b][1,3,4]thiadiazoleHCID 672836162-Amino-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)nicotinonitrile

生成物 1

HCID 469411282-Amino-5-[2-(3,4-dimethoxy-phenyl)-imidazo[2,1-b][1,3,4]thiadiazol-5-yl]-nicotinonitrile収率 22%

試薬・触媒・溶媒 1

HCID 312751,4-Dioxane溶媒

反応条件

温度
110 °C

実験手順

A mixture of 2-(3,4-dimethoxy-phenyl)-5-iodo-imidazo[2,1-b][1,3,4]thiadiazole (0.1 g, 0.258 mmol, 1 eq), 2-amino-5-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-nicotinonitrile (0.11 g, 0.449 mmol, 1.74 eq), PdCl2(Ph3P)2 (36 mg, 0.052 mmol, 0.2 eq) and Na2CO3 (2 M aqueous solution, 0.5 mL) in dioxane was heated at 110° C. for 2.5 h. The reaction was cooled down to it and solvents were removed under reduced pressure. The residue was treated with water, sonicated and then filtered. The solid was washed with water, Et2O, Et2O/MeOH (9:1), and dried. The residue was purified on silica gel (isolute flash Si II, DCM/MeOH 5 to 10% MeOH and biotage, MeOH/DCM, 0% to 10%) to give the desired product (21 mg, 22%). HPLC-MS: (5-100% B in 8 min, 0.8 mL/min, 50° C.): tR=4.68 min, [M+H]+ m/z 379.1; 1H NMR (300 MHz, DMSO) δ 8.91 (d, J=2.4 Hz, 1H), 8.45 (d, J=2.4 Hz, 1H), 7.72 (s, 2H), 7.56 (dd, J=8.4, 2.1 Hz, 1H), 7.48 (d, J=2.1 Hz, 1H), 7.17 (m, 3H), 3.89 (s, 3H), 3.86 (s, 3H).

後処理

  1. temperatureThe reaction was cooled down to it and solvents
  2. customwere removed under reduced pressure
  3. additionThe residue was treated with water
  4. customsonicated
  5. filtrationfiltered
  6. washThe solid was washed with water, Et2O, Et2O/MeOH (9:1)
  7. customdried
  8. customThe residue was purified on silica gel (isolute flash Si II, DCM/MeOH 5 to 10% MeOH and biotage, MeOH/DCM, 0% to 10%)

出典と根拠

ORDレコード
ord-8df65a7d27574fbf87370164da3f6f38
出典データセット
uspto-grants-2014_08
特許番号
US08815918B2

反応ノート

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