期刊
TETRAHEDRON LETTERS
卷 46, 期 26, 页码 4457-4459出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2005.04.127
关键词
pyrazolopyridines; cross-coupling; hetarylacetylenes; heterocyclization
The simple reaction of cyclization of hydrazides of vic-acetylenylbenzoic and acetylenylpyrazole carboxylic acid can lead to four different compounds: five-membered N-aminolactams, six-membered N-aminolactams, six-membered diazinones and diazepinones, but only the first three have been described. In this paper we report the unexpected formation of a bis(pyrazolo[4,3-d][1,2]diazepinone, the structure of which has been established by X-ray crystallography. (c) 2005 Elsevier Ltd. All rights reserved.
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