期刊
JOURNAL OF ORGANIC CHEMISTRY
卷 83, 期 9, 页码 5082-5091出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.joc.8b00421
关键词
-
资金
- National Natural Science Foundation of China [21321061, 21072134, J1103315/J0104]
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'-biary1-2,2'-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.
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