Olefinic cyclizations promoted by Beckmann rearrangement of oxime sulfonate

S Sakane, Y Matsumura, Y Yamamura…

Index: Sakane, Soichi; Matsamura, Yasushi; Yamamura, Yoshihiro; Ishida, Yasuko,; Maruoka, Keiji; Yamamoto, Hisashi Journal of the American Chemical Society, 1983 , vol. 105, # 3 p. 672 - 674

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Citation Number: 41

Abstract

In this paper we report on the syntheses and characterizations of the pentacarbonylmetallate trianions of niobium and tantalum, which are the first compounds to contain these elements in a formal oxidation state of-3. Although metal carbonyl trianions of other second-and third- row transition elements have been claimed, 2 these are also the first examples to have been isolated as analytically pure substances.