Methanesulfonic Acid → (2E)-3-[5-(4-fluorophenyl)-1-methyl-1H-pyrazol-4-yl]-N-{4-[(5-methyl-1,3,4-oxadiazol-2-yl)methyl]phenyl}acrylamide

HRID 30718

反応式

HRID 30718 の反応式
[F:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]2[N:12]([CH3:13])[N:11]=[CH:10][C:9]=2/[CH:14]=[CH:15]/[C:16]([NH:18][C:19]2[CH:24]=[CH:23][C:22]([CH2:25][C:26]([NH:28][NH2:29])=[O:27])=[CH:21][CH:20]=2)=[O:17])=[CH:4][CH:3]=1.[C:30](OCC)(OCC)(OCC)[CH3:31].CS(O)(=O)=O.O1CCCC1>C(OCC)(=O)C>[F:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]2[N:12]([CH3:13])[N:11]=[CH:10][C:9]=2/[CH:14]=[CH:15]/[C:16]([NH:18][C:19]2[CH:20]=[CH:21][C:22]([CH2:25][C:26]3[O:27][C:30]([CH3:31])=[N:29][N:28]=3)=[CH:23][CH:24]=2)=[O:17])=[CH:4][CH:3]=1

参加物

6

反応物 4

HCID 6395Methanesulfonic AcidHCID 8028TetrahydrofuranHCID 66221Triethyl orthoacetateHCID 69209331(2E)-3-[5-(4-fluorophenyl)-1-methyl-1H-pyrazol-4-yl]-N-[4-(2-hydrazino-2-oxoethyl)phenyl]acrylamide

生成物 1

HCID 69210253(2E)-3-[5-(4-fluorophenyl)-1-methyl-1H-pyrazol-4-yl]-N-{4-[(5-methyl-1,3,4-oxadiazol-2-yl)methyl]phenyl}acrylamide収率 47.1%

試薬・触媒・溶媒 1

HCID 8857Ethyl Acetate溶媒

実験手順

A mixture of (2E)-3-[5-(4-fluorophenyl)-1-methyl-1H-pyrazol-4-yl]-N-[4-(2-hydrazino-2-oxoethyl)phenyl]acrylamide (0.50 g), triethyl orthoacetate (0.63 g), methanesulfonic acid (0.025 g), and tetrahydrofuran (10 mL) was heated under reflux for 1 hr. The reaction mixture was diluted with ethyl acetate, washed successively with saturated aqueous sodium hydrogen carbonate and saturated brine, dried over anhydrous magnesium sulfate and concentrated. The residue was subjected to silica gel column chromatography to give (2E)-3-[5-(4-fluorophenyl)-1-methyl-1H-pyrazol-4-yl]-N-{4-[(5-methyl-1,3,4-oxadiazol-2-yl) methyl]phenyl}acrylamide as pale-yellow crystals (0.25 g, yield 46%) from a fraction eluted with ethyl acetate-methanol (100:0-20:1, v/v). Recrystallization thereof from ethyl acetate-hexane gave pale-yellow prism crystals. melting point: 151-152° C.

後処理

  1. temperaturewas heated
  2. temperatureunder reflux for 1 hr
  3. washwashed successively with saturated aqueous sodium hydrogen carbonate and saturated brine
  4. dry with materialdried over anhydrous magnesium sulfate
  5. concentrationconcentrated

出典と根拠

ORDレコード
ord-76a52bfb8fda4b18b22905c1ff77b86f
出典データセット
uspto-grants-2008_09
特許番号
US07423159B2

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