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Sodium Bicarbonate → Phenylmethyl 4-[(6,7-dihydro[1,4]dioxino[2,3-c]pyridazin-3-ylmethyl)amino]-1-piperidinecarboxylate

HRID 656982
ノート
印刷プレビュー

反応式

HRID 656982 の反応式
[NH2:1][CH:2]1[CH2:7][CH2:6][N:5]([C:8]([O:10][CH2:11][C:12]2[CH:17]=[CH:16][CH:15]=[CH:14][CH:13]=2)=[O:9])[CH2:4][CH2:3]1.[N:18]1[C:23]2[O:24][CH2:25][CH2:26][O:27][C:22]=2[CH:21]=[C:20]([CH:28]=O)[N:19]=1.C(O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+].C(=O)(O)[O-].[Na+]>C(Cl)Cl.CO>[N:18]1[C:23]2[O:24][CH2:25][CH2:26][O:27][C:22]=2[CH:21]=[C:20]([CH2:28][NH:1][CH:2]2[CH2:3][CH2:4][N:5]([C:8]([O:10][CH2:11][C:12]3[CH:17]=[CH:16][CH:15]=[CH:14][CH:13]=3)=[O:9])[CH2:6][CH2:7]2)[N:19]=1
参加物実験手順後処理出典と根拠反応ノート

参加物

7

反応物 4

HCID 516892Sodium BicarbonateHCID 5049666Sodium triacetoxyborohydrideHCID 178466404-Amino-1-N-Cbz-piperidineHCID 248916966,7-Dihydro-[1,4]dioxino[2,3-c]pyridazine-3-carbaldehyde

生成物 1

HCID 68811936Phenylmethyl 4-[(6,7-dihydro[1,4]dioxino[2,3-c]pyridazin-3-ylmethyl)amino]-1-piperidinecarboxylate収率 62%

試薬・触媒・溶媒 2

HCID 887Methanol溶媒HCID 6344Dichloromethane溶媒

実験手順

A mixture of phenylmethyl 4-amino-1-piperidinecarboxylate (for a synthesis see WO 2004/058144 Example 99(e)) (14.4 g crude, equivalent to 11 g, 47 mmol) and 6,7-dihydro[1,4]dioxino[2,3-c]pyridazine-3-carbaldehyde (for a preparation see Example 6(e)) (6.46 g, 39 mmol) in DCM (200 ml) and MeOH (10 ml) was stirred for 4 h at rt, then cooled in ice as sodium triacetoxyborohydride (12.4 g) was added over 15 min. After stirring for another 2 h, the mixture was treated with aqueous sodium bicarbonate to neutralise. The aqueous phase was extracted with DCM and the organic fractions were dried and evaporated. Chromatography on silica (750 g), eluting with 0-10% MeOH/DCM, gave the product (11.1 g, 62%).

後処理

  1. additionwas added over 15 min
  2. extractionThe aqueous phase was extracted with DCM
  3. customthe organic fractions were dried
  4. customevaporated
  5. washChromatography on silica (750 g), eluting with 0-10% MeOH/DCM

出典と根拠

ORDレコード
ord-5f08df52828e4deab3b8adc4ece159ab
出典データセット
uspto-grants-2011_12
DOI
10.6084/m9.figshare.5104873.v1
特許番号
US08071592B2

反応ノート

読み込み中…

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