Hydrochloric Acid → (3aR,6aS)-1,3-dibenzylhexahydro-1H-furo[3,4-d]imidazole-2,4-dione

HRID 463738ノート

反応式

HRID 463738 の反応式
[CH2:1]([N:8]1[C@H:12]([C:13](OC)=[O:14])[C@H:11]([C:17](O)=[O:18])[N:10]([CH2:20][C:21]2[CH:26]=[CH:25][CH:24]=[CH:23][CH:22]=2)[C:9]1=[O:27])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[BH4-].[Na+].Cl>C1(C)C=CC=CC=1.C(O)(C)C>[CH2:20]([N:10]1[C@@H:11]2[CH2:17][O:18][C:13](=[O:14])[C@@H:12]2[N:8]([CH2:1][C:2]2[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=2)[C:9]1=[O:27])[C:21]1[CH:26]=[CH:25][CH:24]=[CH:23][CH:22]=1

参加物

6

反応物 3

HCID 313Hydrochloric AcidHCID 4311764Sodium borohydrideHCID 11428617(4R,5S)-1,3-dibenzyl-5-methoxycarbonyl-2-oxoimidazolidine-4-carboxylic acid

生成物 1

HCID 11427250(3aR,6aS)-1,3-dibenzylhexahydro-1H-furo[3,4-d]imidazole-2,4-dione収率 93.5%

試薬・触媒・溶媒 2

HCID 1140Toluene溶媒2 回HCID 3776Isopropanol溶媒

実験手順

A solution of (4R,5S)-1,3-dibenzyl-5-methoxycarbonyl-2-oxoimidazolidine-4-carboxylic acid (mp., 149°-150° C., [α]36525 =+27.7° at c=1.0 in DMF, 368 mg) in toluene (2 ml) and isopropanol (3 ml) was added dropwise to a suspension of sodium borohydride (100 mg) in toluene at 5°-10° C. The obtained mixture was allowed to warm up to room temperature and to react at the same temperature for 18 hours. Then, 1N hydrochloric acid (10 ml) was added dropwise to the mixture. The mixture was stirred at 55°-60° C. for 30 minutes. Aqueous layer was separated from organic layer and extracted once with toluene (15 ml). The organic layers were combined, washed successively with water, 5% aqueous sodium hydrogen carbonate and water, dried over anhydrous magnesium sulfate and concentrated to give (3aR,6aS)-1,3-dibenzylhexahydro-1H-furo[3,4-d]imidazole-2,4-dione (301 mg). M.P., 116°-118° C. [α]D25 =-61.8° (c=1, CHCl3).

後処理

  1. customto react at the same temperature for 18 hours
  2. customAqueous layer was separated from organic layer
  3. extractionextracted once with toluene (15 ml)
  4. washwashed successively with water, 5% aqueous sodium hydrogen carbonate and water
  5. dry with materialdried over anhydrous magnesium sulfate
  6. concentrationconcentrated

出典と根拠

ORDレコード
ord-7132a57822484d77bc4744d10d522e3f
出典データセット
uspto-grants-1985_10
特許番号
US04544635

反応ノート

読み込み中…