Direct ortho-Selective Amination of 2-Naphthol and Its Analogues with Hydrazines,The Journal of Organic Chemistry

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Direct ortho-Selective Amination of 2-Naphthol and Its Analogues with Hydrazines
The Journal of Organic Chemistry ( IF 3.3 ) Pub Date : 2018-04-12 00:00:00 , DOI: 10.1021/acs.joc.8b00421
Lei Jia ₁ , Qiang Tang _{1,

2} , Meiming Luo ₁ , Xiaoming Zeng ₁

Affiliation

Described herein 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 can be formed in ethylene glycol in moderate to excellent yields. Variation of substrates to N,N′-diarylhydrazines and N-methyl-N,N′-diarylhydrazines led to N-aryl-1-amino-2-naphthol compounds. It is noted that biologically interesting indazole motifs can be facilely created by the reaction of N,N′-dialkylhydrazines with 2-naphthols. These ortho-amination reactions have the advantage of one-pot operation without the use of transition metal catalysts.

中文翻译：

2-萘酚的直接邻位氨基化及其与肼的类似物

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。

更新日期：2018-04-12

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