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

HRID 642933

反応式

HRID 642933 の反応式
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]

参加物

6

反応物 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

生成物 1

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

試薬・触媒・溶媒 1

HCID 312751,4-Dioxane溶媒

実験手順

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.

後処理

  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

出典と根拠

ORDレコード
ord-06ada91244b84992a9a96ee57f14e80c
出典データセット
uspto-grants-2010_04
特許番号
US07696345B2

関連ノート

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