Hydrochloric Acid → 6-[1-(2,5-dichlorophenyl)-cyclopentylmethyl]-9-hydroxy-2-isopropyl-3,4-dihydro-2H-pyrazino[1,2-c]pyrimidine-1,8-dione

HRID 2169254ノート

反応式

HRID 2169254 の反応式
C([O:8][C:9]1[C:14](=[O:15])[N:13]=[C:12]([CH2:16][C:17]2([C:22]3[CH:27]=[C:26]([Cl:28])[CH:25]=[CH:24][C:23]=3[Cl:29])[CH2:21][CH2:20][CH2:19][CH2:18]2)[N:11]2[CH2:30][CH2:31][N:32]([CH:35]([CH3:37])[CH3:36])[C:33](=[O:34])[C:10]=12)C1C=CC=CC=1.Cl.C(OCC)(=O)C>CO>[Cl:29][C:23]1[CH:24]=[CH:25][C:26]([Cl:28])=[CH:27][C:22]=1[C:17]1([CH2:16][C:12]2[N:11]3[CH2:30][CH2:31][N:32]([CH:35]([CH3:37])[CH3:36])[C:33](=[O:34])[C:10]3=[C:9]([OH:8])[C:14](=[O:15])[N:13]=2)[CH2:21][CH2:20][CH2:19][CH2:18]1

参加物

5

反応物 3

HCID 313Hydrochloric AcidHCID 8857Ethyl AcetateHCID 867259049-benzyloxy-6-[1-(2,5-dichlorophenyl)-cyclopentylmethyl]-2-isopropyl-3,4-dihydro-2H-pyrazino[1,2-c]pyrimidine-1,8-dione

生成物 1

HCID 867259056-[1-(2,5-dichlorophenyl)-cyclopentylmethyl]-9-hydroxy-2-isopropyl-3,4-dihydro-2H-pyrazino[1,2-c]pyrimidine-1,8-dione収率 11.34%

試薬・触媒・溶媒 1

HCID 887Methanol溶媒

実験手順

To a stirred solution of 9-benzyloxy-6-[1-(2,5-dichlorophenyl)-cyclopentylmethyl]-2-isopropyl-3,4-dihydro-2H-pyrazino[1,2-c]pyrimidine-1,8-dione (208) (500 mg, 0.93 mmol) in methanol (5.5 mL) was added concentrated HCl (4 mL) and the mixture was stirred for 20 h. Silica thin layer chromatography was performed (100% ethyl acetate, Rf=0.3). Methanol was removed, water was added, the mixture was basified (pH˜8) with solid NaHCO3, extracted with ethyl acetate (3×20 mL), and the organic part was dried and concentrated. The crude product was purified by preparative HPLC purification to get 6-[1-(2,5-dichlorophenyl)-cyclopentylmethyl]-9-hydroxy-2-isopropyl-3,4-dihydro-2H-pyrazino[1,2-c]pyrimidine-1,8-dione (209) (32 mg, 11.34%) as a light brown solid.

後処理

  1. customMethanol was removed
  2. additionwater was added
  3. extractionextracted with ethyl acetate (3×20 mL)
  4. customthe organic part was dried
  5. concentrationconcentrated
  6. customThe crude product was purified by preparative HPLC purification

出典と根拠

ORDレコード
ord-f47f4861811d4552942d62435e88770a
出典データセット
uspto-grants-2015_06
特許番号
US09045486B2

反応ノート

読み込み中…