Hydrochloric Acid → tert-Butyl ((1R,2S)-1-(2,3-dihydrobenzo[b][1,4]dioxin-6-yl)-1-hydroxypropan-2-yl)carbamate

HRID 1661476ノート

反応式

HRID 1661476 の反応式
C([Mg]Cl)(C)C.CON(C)[C:9](=[O:20])[C@@H:10]([NH:12][C:13](=[O:19])[O:14][C:15]([CH3:18])([CH3:17])[CH3:16])[CH3:11].[O:22]1[CH2:27][CH2:26][O:25][C:24]2[CH:28]=[C:29]([Mg]Br)[CH:30]=[CH:31][C:23]1=2.Cl>C1COCC1.O>[O:22]1[C:23]2[CH:31]=[CH:30][C:29]([C@@H:9]([OH:20])[C@@H:10]([NH:12][C:13](=[O:19])[O:14][C:15]([CH3:16])([CH3:17])[CH3:18])[CH3:11])=[CH:28][C:24]=2[O:25][CH2:26][CH2:27]1

参加物

7

反応物 4

HCID 313Hydrochloric AcidHCID 11806530(S)-tert-Butyl (1-(methoxy(methyl)amino)-1-oxopropan-2-yl)carbamateHCID 178418918HCID 178418918、化合物HCID 178419614HCID 178419614、化合物

生成物 1

HCID 59339843tert-Butyl ((1R,2S)-1-(2,3-dihydrobenzo[b][1,4]dioxin-6-yl)-1-hydroxypropan-2-yl)carbamate

試薬・触媒・溶媒 2

HCID 962Water溶媒HCID 8028Tetrahydrofuran溶媒3 回

実験手順

Isopropylmagnesium chloride, 2M in THF (6.5 mL, 13.00 mmol) was added to a suspension of (S)-tert-butyl 1-(methoxy(methyl)amino)-1-oxopropan-2-ylcarbamate (3 g, 12.92 mmol) in THF (30 mL) keeping the temperature below −10° C. (2,3-dihydrobenzo[b][1,4]dioxin-6-yl)magnesium bromide, 0.7M in THF (20 mL, 14.00 mmol) was added. The reaction mixture was stirred at room temperature for 17 hours. 1N HCl (300 mL) was cooled on ice bath to +10° C., the reaction mixture was poured into the acidic water solution and extracted with TBME=tert-butyl methyl ether. The ether phases were washed with water, brine and dried (Na2SO4). Filtration and evaporation of solvents afforded a crude product as a slightly yellow oil that was purified by flash chromatography using TBME:Heptane=1:2 as eluent.

後処理

  1. additionwas added
  2. extractionextracted with TBME=tert-butyl methyl ether
  3. washThe ether phases were washed with water, brine
  4. dry with materialdried (Na2SO4)
  5. filtrationFiltration and evaporation of solvents

出典と根拠

ORDレコード
ord-16426c6fdbd54b418a1d6862a765074e
出典データセット
uspto-grants-2011_10
特許番号
US08030340B2

反応ノート

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