2,4,6-Trimethylpyridine → Ethyl 14-chloro-2-(1-methylethyl)-5,9,13-trimethyl-2,4,8,12-tetradecatetraenoate

HRID 486862

反応式

HRID 486862 の反応式
[CH2:1]([O:3][C:4](=[O:25])[C:5]([CH:22]([CH3:24])[CH3:23])=[CH:6][CH:7]=[C:8]([CH3:21])[CH2:9][CH2:10][CH:11]=[C:12]([CH3:20])[CH2:13][CH2:14][CH:15]=[C:16]([CH3:19])[CH2:17]O)[CH3:2].CC1C=C(C)N=C(C)C=1.[Cl-].[Li+].CS([Cl:41])(=O)=O>C(OCC)C.O.CN(C)C=O>[CH2:1]([O:3][C:4](=[O:25])[C:5]([CH:22]([CH3:24])[CH3:23])=[CH:6][CH:7]=[C:8]([CH3:21])[CH2:9][CH2:10][CH:11]=[C:12]([CH3:20])[CH2:13][CH2:14][CH:15]=[C:16]([CH3:19])[CH2:17][Cl:41])[CH3:2]

参加物

8

反応物 4

HCID 79532,4,6-TrimethylpyridineHCID 31297Methanesulfonyl chlorideHCID 433294Lithium ChlorideHCID 54363154Ethyl 14-hydroxy-2-(1-methylethyl)-5,9,13-trimethyl-2,4,8,12-tetradecatetraenoate

生成物 1

HCID 54546229Ethyl 14-chloro-2-(1-methylethyl)-5,9,13-trimethyl-2,4,8,12-tetradecatetraenoate収率 88%

試薬・触媒・溶媒 3

HCID 962Water溶媒HCID 3283Diethyl Ether溶媒HCID 6228Dimethylformamide溶媒

実験手順

To a mixture of the hydroxyester compound which is 14-hydroxy-2-(1-methylethyl)-5,9,13-trimethyl-2,4,8,12-tetradecatetraenoic acid ethyl ester (71.0 mg, 0.20 mmol), S-collidine (26.7 mg, 0.22 mmol), lithium chloride (8.5 mg, 0.20 mmol) and dimethylformamide (1 ml) is added methanesulfonyl chloride (25.2 mg, 0.22 mmol) under nitrogen atmosphere while stirring on an ice-bath. The stirring is continued at the same temperature for 5 hours. After confirming disappearance of the starting compound, to the reaction mixture are added water and ethyl ether and the organic layer is separated. The organic layer is washed with water, dried (MgSO4) and concentrated. The resulting residue is chromatographed (n-hexane/ethyl acetate=10:1) on silica gel column to give the desired 14-chloro-2-(1-methylethyl)-5,9,13-trimethyl-2,4,8,12-tetradecatetraenoic acid ethyl ester (64.6 mg, 86%) from the desired fraction.

後処理

  1. customthe organic layer is separated
  2. washThe organic layer is washed with water
  3. dry with materialdried (MgSO4)
  4. concentrationconcentrated
  5. customThe resulting residue is chromatographed (n-hexane/ethyl acetate=10:1) on silica gel column

出典と根拠

ORDレコード
ord-08c8d6224e744d0c8668bf1c9afa5f07
出典データセット
uspto-grants-1994_03
特許番号
US05292911

関連ノート

読み込み中…