Nucleophilic substitution on 4-hydroxymethylanilines under ‘neutral’ conditions via aza quinone methide intermediate
作者:Hiroyasu Takahashi、Nobuyuki Kashiwa、Hisayoshi Kobayashi、Yuichi Hashimoto、Kazuo Nagasawa
DOI:10.1016/s0040-4039(02)01198-x
日期:2002.8
Substitution reaction of 4-hydroxymethylaniline derivatives with resonance-stabilized carbon nucleophiles and an acid-labile nucleophile, including β-ketoester, 1,3-diketone, α-nitroester, and silylenolether, proceeded efficiently upon heating at 80°C in a neutral solvent system. The reaction was successfully applied to the synthesis of 4-aminophenylalanine.
在中性溶剂中于80°C加热后,4-羟甲基苯胺衍生物与共振稳定的碳亲核试剂和酸不稳定的亲核试剂(包括β-酮酸酯,1,3-二酮,α-硝基酯和甲硅烷基醚)的取代反应有效地进行。系统。该反应成功地用于合成4-氨基苯丙氨酸。