Benzaldehyde → Mandelonitrile, (+)-

HRID 359914

反応式

HRID 359914 の反応式
C#N.C(=O)C1C=CC=CC=1.[C:11]([CH:13]([OH:20])[C:14]1[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=1)#[N:12]>ClCCl.[Ti]>[C:11]([C@H:13]([OH:20])[C:14]1[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=1)#[N:12]

参加物

6

反応物 3

HCID 240BenzaldehydeHCID 768Hydrogen CyanideHCID 10758Mandelonitrile

生成物 1

HCID 9548674Mandelonitrile, (+)-収率 55%

試薬・触媒・溶媒 2

HCID 23963Titanium触媒HCID 6344Dichloromethane溶媒

実験手順

To a solution of L(+)-diethyl tartarate (412 mg) in absolute dichloromethane (20 ml), tetaraisopropyl titanate (568 mg) was dropwise added and stirred at room temperature for 30 minutes. After evaporating volatile components off in the same manner as in Example 1, to the residue, dichloromethane (20 ml) was added and stirred at room temperature to obtain a homogeneous solution. After cooling the resulting solution to 0° C., hydrogen cyanide (0.4 ml) and then benzaldehyde (212 mg) were added and stirred at room temperature for 15 hours. Thereafter, the reaction mixture was treated in the same manner as in Example 1 and analyzed by HPLC to reveal that α-cyanobenzyl alcohol was produced in the yield of 55% which contained the R(+) isomer with the enantiomer excess percentage of 77%.

後処理

  1. customAfter evaporating volatile components off in the same manner as in Example 1
  2. additionto the residue, dichloromethane (20 ml) was added
  3. stirringstirred at room temperature
  4. customto obtain a homogeneous solution
  5. temperatureAfter cooling the resulting solution to 0° C.
  6. stirringstirred at room temperature for 15 hours
  7. additionThereafter, the reaction mixture was treated in the same manner as in Example 1
  8. customwas produced in the yield of 55% which

出典と根拠

ORDレコード
ord-0da8112aec424316aed76fc8b55c3ac9
出典データセット
uspto-grants-1991_03
特許番号
US05003083

関連ノート

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