反応式
[OH:1][CH2:2][CH2:3][C:4]([O:6][CH3:7])=[O:5].C([N-]C(C)C)(C)C.[Li+].[CH2:16](Br)[C:17]1[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=1>>[CH2:16]([CH:3]([CH2:2][OH:1])[C:4]([O:6][CH3:7])=[O:5])[C:17]1[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=1参加物
実験手順
β-Propiolactone (A) is dissolved in methanol and treated with 1 equivalent of triethylamine to produce methyl 3-hydroxypropionate (B). Compound B is converted to the dianion with 2 equivalents of lithium diisopropylamide and alkylated with 1 equivalent of benzyl bromide to produce methyl 2-benzyl-3-hydroxypropionate (C). Compound C is protected as the t-butyldimethylsilyl ether (D). Compound D is then saponified with potassium hydroxide and carefully acidified to produce the acid (E). The acid (E) is then dissolved in tetrahydrofuran, treated with 1 equivalent of N-methylmorpholine and cooled to -20° C. One equivalent of isobutyl chloroformate is added, followed by 1 equivalent of 5,6-diamino-1,3-dipropyluracil in dimethyl-formamide to produce the amide. The amide is then treated with aqueous potassium hydroxide at 70° C. to produce the cyclized, deprotected 3,7-dihydro-8[(R)-1-methyl-2-phenyl-ethyl]1, 3-dipropyl-1H-purine-2,6-dione. ##STR8##
出典と根拠
- ORDレコード
- ord-35f8c41bee5b408ea49f18aaab3ad9cc
- 出典データセット
- uspto-grants-1998_11
- 特許番号
- US05840729
関連ノート
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