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- W2040243481 abstract "Most heterogeneous catalysts utilized for the formation of 5-substituted 1H-tetrazoles contain zinc as the metal core at the catalytically active site. In this paper, we report that the tungstate MWO4 (M = Ba, Ca, Zn, Cd, Cu, Na, H) can catalyze the [2+3] cycloaddition reaction of nitriles with sodium azide to produce 5-substituted 1H-tetrazoles in DMF. The catalyst is very efficient, affording good yield of aromatic nitriles and can be reused for several cycles. The mono- and di-addition products from dicyanobenzene can be selectively synthesized, which is a development being reported for the first time. The mechanism of the catalysis may originate from the nitrile group coordinating with the unsaturated W atoms, formed by oxygen vacancies on the surface of solid tungstates." @default.
- W2040243481 created "2016-06-24" @default.
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- W2040243481 date "2009-05-01" @default.
- W2040243481 modified "2023-09-27" @default.
- W2040243481 title "Tungstates: Novel heterogeneous catalysts for the synthesis of 5-substituted 1H-tetrazoles" @default.
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- W2040243481 doi "https://doi.org/10.1016/j.molcata.2009.01.037" @default.
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