(2S,5R)-1-tert-butyl 2-methyl 5-(N-(allyloxy)-2-nitrophenylsulfonamido)-4-methyl-5,6-dihydropyridine-1,2(2H)-dicarboxylate → (2S,5R)-methyl 5-(N-(allyloxy)-2-nitrophenylsulfonamido)-4-methyl-1,2,5,6-tetrahydropyridine-2-carboxylate

HRID 627089ノート

反応式

HRID 627089 の反応式
[CH2:1]([O:4][N:5]([C@H:18]1[CH2:23][N:22](C(OC(C)(C)C)=O)[C@H:21]([C:31]([O:33][CH3:34])=[O:32])[CH:20]=[C:19]1[CH3:35])[S:6]([C:9]1[CH:14]=[CH:13][CH:12]=[CH:11][C:10]=1[N+:15]([O-:17])=[O:16])(=[O:8])=[O:7])[CH:2]=[CH2:3]>C(Cl)Cl.[Br-].[Zn+2].[Br-]>[CH2:1]([O:4][N:5]([C@H:18]1[CH2:23][NH:22][C@H:21]([C:31]([O:33][CH3:34])=[O:32])[CH:20]=[C:19]1[CH3:35])[S:6]([C:9]1[CH:14]=[CH:13][CH:12]=[CH:11][C:10]=1[N+:15]([O-:17])=[O:16])(=[O:8])=[O:7])[CH:2]=[CH2:3]

参加物

4

反応物 1

HCID 89851906(2S,5R)-1-tert-butyl 2-methyl 5-(N-(allyloxy)-2-nitrophenylsulfonamido)-4-methyl-5,6-dihydropyridine-1,2(2H)-dicarboxylate2 回

生成物 1

HCID 89852412(2S,5R)-methyl 5-(N-(allyloxy)-2-nitrophenylsulfonamido)-4-methyl-1,2,5,6-tetrahydropyridine-2-carboxylate収率 100%

試薬・触媒・溶媒 2

HCID 10421208Zinc bromide触媒HCID 6344Dichloromethane溶媒2 回

実験手順

To a solution of (2S,5R)-1-tert-butyl 2-methyl 5-(N-(allyloxy)-2-nitrophenylsulfonamido)-4-methyl-5,6-dihydropyridine-1,2(2H)-dicarboxylate (Intermediate 27, 2.06 g, 4.03 mmol) in DCM (20 mL) at room temperature was added zinc bromide (0.648 mL, 12.08 mmol). After stirring overnight, the reaction mixture was diluted with dichloromethane and washed with saturated sodium bicarbonate and brine. The organics were dried over magnesium sulfate, filtered and concentrated to afford the desired product (1.650 g, 100%) as a light yellow foam.

後処理

  1. washwashed with saturated sodium bicarbonate and brine
  2. dry with materialThe organics were dried over magnesium sulfate
  3. filtrationfiltered
  4. concentrationconcentrated

出典と根拠

ORDレコード
ord-38875678747743afaf31c976ac7fce00
出典データセット
uspto-grants-2016_04
特許番号
US09309245B2

反応ノート

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