Nitrogen → Nalpha-Acetyl-p-Nitro-D-Phenylalanine Methyl Ester

HRID 280043

反応式

HRID 280043 の反応式
[C:1]([NH:4][C@@H:5]([C:16]([OH:18])=[O:17])[CH2:6][C:7]1[CH:12]=[CH:11][C:10]([N+:13]([O-:15])=[O:14])=[CH:9][CH:8]=1)(=[O:3])[CH3:2].[N+](=[CH2:21])=[N-].N(CNC(N)=O)=O.[OH-].[K+].N#N>O1CCCC1.CCOCC>[CH3:21][O:17][C:16](=[O:18])[C@@H:5]([CH2:6][C:7]1[CH:8]=[CH:9][C:10]([N+:13]([O-:15])=[O:14])=[CH:11][CH:12]=1)[NH:4][C:1](=[O:3])[CH3:2]

参加物

8

反応物 5

HCID 947NitrogenHCID 9550Diazomethane3 回HCID 14797Potassium HydroxideHCID 104823Urea, (nitrosomethyl)-HCID 7039504(R)-2-Acetamido-3-(4-nitrophenyl)propanoic acid

生成物 1

HCID 10978383Nalpha-Acetyl-p-Nitro-D-Phenylalanine Methyl Ester

試薬・触媒・溶媒 2

HCID 3283Diethyl Ether溶媒HCID 8028Tetrahydrofuran溶媒

実験手順

Compound 7 was dissolved in tetrahydrofuran (120 ml) and cooled in an ice bath. Diazomethane was generated by addition of N-nitrosomethylurea to an ice cold, equivolume mixture of ether and 40% aqueous potassium hydroxide. The diazomethane solution was added without purification to the stirred solution of the amino acid derivative. The reaction was complete when N2 was no longer evolved upon addition of diazomethane. Excess diazomethane was consumed by the addition of acetic acid. The solution was extracted successively with saturated saline, 1M sodium bicarbonate, 0.1M HCl, and again with saline and dried (MgSO4). Evaporation left 3.56 g (88.4%) of a solid melting at 110°-112° C. which was pure by TLC (chloroform/methanol acid: 85/10/5). [α]D25 =-13.8 (c=2.1, ethanol)

後処理

  1. temperaturecooled in an ice bath
  2. customExcess diazomethane was consumed by the addition of acetic acid
  3. extractionThe solution was extracted successively with saturated saline, 1M sodium bicarbonate, 0.1M HCl
  4. dry with materialagain with saline and dried (MgSO4)
  5. customEvaporation
  6. waitleft 3.56 g (88.4%) of a solid melting at 110°-112° C. which

出典と根拠

ORDレコード
ord-c6a4f985272e48bab99db4486b2e89fc
出典データセット
uspto-grants-1986_05
特許番号
US04587046

関連ノート

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