期刊
TETRAHEDRON LETTERS
卷 46, 期 36, 页码 6011-6014出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2005.07.018
关键词
cyclocondensation; microwave irradiation; heterocycles; 4,5-dihydro-pyrazole; 1,2-dihydro-phthalazine
Direct syntheses of 4,5-dihydro-pyrazole, pyrazolidine, and 1,2-dihydro-phthalazine derivatives via double-alkylation of hydrazines by alkyl dihalides or ditosylates were accomplished in aqueous media under microwave irradiation conditions; the environmentally friendlier chemical transformation occurred in a single step and eliminated the use of expensive metal catalysts in building two C-N bonds. (c) 2005 Elsevier Ltd. All rights reserved.
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