Lithium Hydroxide → 4-(Diethoxyphosphoryl)benzoic acid

HRID 719247

反応式

HRID 719247 の反応式
C([O:3][C:4](=[O:19])[C:5]1[CH:10]=[CH:9][C:8]([P:11]([O:16][CH2:17][CH3:18])([O:13][CH2:14][CH3:15])=[O:12])=[CH:7][CH:6]=1)C.[OH-].[Li+]>CO.O>[CH2:17]([O:16][P:11]([C:8]1[CH:9]=[CH:10][C:5]([C:4]([OH:19])=[O:3])=[CH:6][CH:7]=1)([O:13][CH2:14][CH3:15])=[O:12])[CH3:18]

参加物

5

反応物 2

HCID 3939Lithium HydroxideHCID 2773693Ethyl 4-(diethoxyphosphoryl)benzoate

生成物 1

HCID 27736884-(Diethoxyphosphoryl)benzoic acid

試薬・触媒・溶媒 2

HCID 887Methanol溶媒HCID 962Water溶媒

実験手順

To a solution of 4-(diethoxyphosphoryl)-benzoic acid ethyl ester (2b) (2.46 g, 8.59 mmol) in methanol (86 mL) was slowly added lithium hydroxide (monohydrate, 0.36 g, 8.59 mmol) in water (86 mL). The resulting reaction mixture was stirred at room temperature for 4 hours. The reaction mixture was concentrated to remove methanol and diluted with brine, then extracted with EtOAc (3×100 mL) until the aqueous layer showed little or no evidence of product by HPLC. The combined organics were dried over Na2SO4 and concentrated on a rotary evaporator. The desired product was purified by crystallization from hexane/ethyl acetate (2.37 g), m.p. 101° C. 1H NMR (300 MHz, CDCl3) δ(ppm)): 1.27 (t, J=7.03 Hz, 6H), 4.03 (q, J=7.03 Hz, 4H), 7.85 (m, 2H), 8.09 (m, 2H), 12.65 (bs, 1H). 31P NMR (121 MHz, CDCl3) δ 21.611.

後処理

  1. customThe resulting reaction mixture
  2. concentrationThe reaction mixture was concentrated
  3. customto remove methanol
  4. additiondiluted with brine
  5. extractionextracted with EtOAc (3×100 mL) until the aqueous layer
  6. dry with materialThe combined organics were dried over Na2SO4
  7. concentrationconcentrated on a rotary evaporator
  8. customThe desired product was purified by crystallization from hexane/ethyl acetate (2.37 g), m.p. 101° C

出典と根拠

ORDレコード
ord-3e4420040f774f96a0ef13572d009796
出典データセット
uspto-grants-2006_11
特許番号
US07132427B2

関連ノート

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