Direct<i>ortho</i>-Selective Amination of 2-Naphthol and Its Analogues with Hydrazines
作者:Lei Jia、Qiang Tang、Meiming Luo、Xiaoming Zeng
DOI:10.1021/acs.joc.8b00421
日期:2018.5.4
is a regioselective ortho-amination of 2-naphthol and its analogues with substituted hydrazines. It provides a direct methodology for the synthesis of N-arylaminated naphthol derivatives without the formation of related 1,1′-biaryl-2,2′-diamine or carbazole byproducts. Specifically, using N,N-disubstituted hydrazine precursors, N-unsubstituted ortho-aminated derivatives and related secondary amines
本文描述了2-萘酚及其类似物与取代的肼的区域选择性邻氨基化。它为合成N-芳基化萘酚衍生物提供了直接的方法,而没有形成相关的1,1'-联芳基-2,2'-二胺或咔唑副产物。具体而言,使用Ñ,Ñ二取代肼前体,Ñ -未被取代的邻位-aminated衍生物,并且可以形成与仲胺在乙二醇中中度至良好的产率。底物向N,N'-二芳基肼和N-甲基-N,N的变化′ -二芳基肼生成N-芳基-1-氨基-2-萘酚化合物。应当指出,可以通过N,N′-二烷基肼与2-萘酚的反应容易地产生生物学上有趣的吲唑基序。这些邻氨基化反应具有一锅操作的优点,而无需使用过渡金属催化剂。