期刊
TETRAHEDRON LETTERS
卷 47, 期 52, 页码 9221-9225出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2006.10.139
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An efficient synthesis of dispiroindenoquinoxaline pyrrolizidine derivatives has been expediently accomplished by a one-pot four component 1,3-dipolar cycloaddition reaction. High regioselectivity was achieved using heteropolyacid H-4[Si(W3O10)(3)]-silica as a catalyst. X-ray diffraction studies of one of the cycloadducts proved the structure and regiochemistry of the cycloadduct. (c) 2006 Elsevier Ltd. All rights reserved.
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