Methyl iodide → Benzyl 6-methyl-3-chloro-1-azabicyclo[3.2.0]hept-2-en-7-one-2-carboxylate

HRID 247487ノート

反応式

HRID 247487 の反応式
[Cl:1][C:2]1[CH2:8][CH:7]2[N:4]([C:5](=[O:9])[CH2:6]2)[C:3]=1[C:10]([O:12][CH2:13][C:14]1[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=1)=[O:11].[CH:20]([N-]C(C)C)(C)C.[Li+].CI.[NH4+].[Cl-]>C1COCC1.CCOC(C)=O>[CH3:20][CH:6]1[C:5](=[O:9])[N:4]2[CH:7]1[CH2:8][C:2]([Cl:1])=[C:3]2[C:10]([O:12][CH2:13][C:14]1[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=1)=[O:11]

参加物

7

反応物 4

HCID 6328Methyl iodideHCID 25517Ammonium ChlorideHCID 2724682Lithium diisopropylamideHCID 12804728Benzyl 3-chloro-1-azabicyclo[3.2.0]hept-2-en-7-one-2carboxylate

生成物 1

HCID 15136304Benzyl 6-methyl-3-chloro-1-azabicyclo[3.2.0]hept-2-en-7-one-2-carboxylate

試薬・触媒・溶媒 2

HCID 8028Tetrahydrofuran溶媒2 回HCID 8857Ethyl Acetate溶媒

実験手順

A solution of benzyl 3-chloro-1-azabicyclo[3.2.0]hept-2-en-7-one-2-carboxylate (56 mg) in anhydrous THF (0.5 ml) is added dropwise over a few minutes to a stirring solution of lithium diisopropylamide (from 31 μl diisopropylamine and 140 μl 1.6N BuLi) in anhydrous THF (3 ml) at -78°. After 15 more mins at -78°, the solution is treated with methyliodide (125 μl) and then allowed to warm to -20° over a period of 30 mins. Saturated aqueous NH4Cl (3 ml) is added and the mixture is allowed to come to room temperature. The mixture is diluted with EtOAc (50 ml), washed with pH 3 phosphate buffer, water, 5% NaHCO3, and brine, dried with magnesium sulfate, and evaporated in vacuo to give benzyl 6-methyl-3-chloro-1-azabicyclo[3.2.0]hept-2-en-7-one-2-carboxylate.

後処理

  1. temperatureto warm to -20° over a period of 30 mins
  2. customto come to room temperature
  3. washwashed with pH 3 phosphate buffer, water, 5% NaHCO3, and brine
  4. dry with materialdried with magnesium sulfate
  5. customevaporated in vacuo

出典と根拠

ORDレコード
ord-41d59d479c1740f88eae7f94a19e1e20
出典データセット
uspto-grants-1987_11
特許番号
US04707547

反応ノート

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