Synthesis of α-amino ketones through aminations of umpoled enolates
作者:Xiaowen Xia、Bocheng Chen、Xiaojun Zeng、Bo Xu
DOI:10.1039/c8ob02004c
日期:——
An efficient synthesis of α-amino ketones is developed using the umpolung strategy. Umpoled enolates such as N-alkenoxypyridinium salts react smoothly with diverse amines to give α-amino ketones via an SN2′ pathway. This umpolung strategy overcomes the drawbacks of traditional methods such as the need for prefunctionalized ketone derivatives. Our method also offers good chemical yields and high functional
使用umpolung策略开发了α-氨基酮的有效合成方法。诸如N-烯氧基吡啶鎓盐之类的酚醛树脂与各种胺能顺利反应,通过S N 2'途径生成α-氨基酮。这种抗药性策略克服了传统方法的缺点,例如需要预官能化的酮衍生物。我们的方法还具有良好的化学收率和较高的官能团耐受性。
Electrochemical Formation of Methoxy- and Cyano(phenylazo)alkanes from Aldehyde and Ketone Phenylhydrazones
Several aldehyde and ketonephenylhydrazones were electrooxidized in MeOH. Electrooxidation in the presence of KI or tetraethylammonium p-toluenesulfonate as the supporting electrolyte afforded the corresponding methoxy(phenylazo)alkanes. whereas electrooxidation in the presence of KI, NaCN, and HOAc afforded the cyano(phenylazo)alkanes.
几种醛和酮苯腙在 MeOH 中被电氧化。在 KI 或对甲苯磺酸四乙基铵作为支持电解质的情况下进行电氧化,得到相应的甲氧基(苯偶氮)烷烃。而在 KI、NaCN 和 HOAc 存在下的电氧化得到氰基(苯偶氮)烷烃。