Agents de dédoublement. 3. Ethers benzyliques du (R)-(−) et du (S)-(+)-2-aminobutan-1-ol, et leur utilisation dans le dédoublement de dérivés N-acylés de la phénylglycine et de la p-hydroxyphénylglycine
作者:Joël Touet、Laurent Faveriel、Eric Brown
DOI:10.1016/0040-4020(94)01037-z
日期:1995.2
Treatment of the readily available (S)-(+) and (R)-(-) enantiomers of 2-aminobutan-1-ol 1 with sodium hydride followed by benzyl chloride, or a substituted benzyl halide, afforded the corresponding O-benzyl bases 4-7 ill good yields. These new bases are recommended for the large scale resolution of racemic acids. For instance, they proved efficient for the practical resolutions of alpha-methylsuccinic acid (+/-)-9, N-acetylphenylglycine (+/-)-11, N-acetyl-(4-hydroxyphenyl) glycine (+/-)-14 and N-chloroacetyl-(4-hydroxyphenyl) glycine (+/-)-15.