Acetic Acid → 1-[4-(tert-butyl-diphenyl-silanyloxy)-3-hydroxy-5,5-bis-hydroxymethyl-tetrahydro-furan-2-yl]-1H-pyrimidine-2,4-dione

HRID 1645303

반응식

HRID 1645303 반응식
C=O.[OH-].[Na+].[C:5]([Si:9]([C:36]1[CH:41]=[CH:40][CH:39]=[CH:38][CH:37]=1)([C:30]1[CH:35]=[CH:34][CH:33]=[CH:32][CH:31]=1)[O:10][CH:11]1[CH:15]([CH:16]=[O:17])[O:14][CH:13]([N:18]2[CH:23]=[CH:22][C:21](=[O:24])[NH:20][C:19]2=[O:25])[CH:12]1[O:26]C(=O)C)([CH3:8])([CH3:7])[CH3:6].[C:42](O)(=[O:44])C>O1CCOCC1>[C:5]([Si:9]([C:36]1[CH:41]=[CH:40][CH:39]=[CH:38][CH:37]=1)([C:30]1[CH:35]=[CH:34][CH:33]=[CH:32][CH:31]=1)[O:10][CH:11]1[C:15]([CH2:42][OH:44])([CH2:16][OH:17])[O:14][CH:13]([N:18]2[CH:23]=[CH:22][C:21](=[O:24])[NH:20][C:19]2=[O:25])[CH:12]1[OH:26])([CH3:7])([CH3:6])[CH3:8]

참가 물질

6

반응물 4

HCID 176Acetic AcidHCID 712FormaldehydeHCID 14798Sodium HydroxideHCID 86594161Acetic Acid 4-(tert-butyl-diphenyl-silanyloxy)-2-(2,4-dioxo-3,4-dihydro-2H-pyrimidin-1-yl)-5-formyl-tetrahydro-furan-3-yl Ester

생성물 1

HCID 667727291-[4-(tert-butyl-diphenyl-silanyloxy)-3-hydroxy-5,5-bis-hydroxymethyl-tetrahydro-furan-2-yl]-1H-pyrimidine-2,4-dione

시약·촉매·용매 1

HCID 312751,4-Dioxane용매

실험 절차

Hydroxymethylation of the 5′-aldehyde is performed as per the method of Cannizzaro which is well documented in the literature (Jones, G. H., et. al., J. Org. Chem. 1979, 44, 1309-1317). These conditions are expected to additionally remove the 2′-O-acetyl group. Generally, Briefly, formaldehyde (2.0 eq., 37% aq.) and NaOH (1.2 eq., 2 M) is added to a solution of Compound 10 in 1,4-dioxane. After stirring at room temperature for several hours, this mixture is neutralized with acetic acid, evaporated to dryness, suspended in methanol, and evaporated onto silica gel. The resulting mixture is added to the top of a silica gel column and eluted using an appropriate solvent system to give Compound 11.

후처리

  1. customto additionally remove the 2′-O-acetyl group
  2. customevaporated to dryness
  3. customevaporated onto silica gel
  4. additionThe resulting mixture is added to the top of a silica gel column
  5. washeluted

출처 및 근거

ORD 기록
ord-981b06269c9643f68fe386725b283c87
출처 데이터셋
uspto-grants-2012_02
특허 번호
US08124745B2

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