An unusual cyclization of trifluoroacetohydroximoyl and -hydrazonoyl bromides with malononitrile.

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概要

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• Trifluoroacetohydroximoyl bromide etherate (<B>1</B>) reacted with an excess of malononitrile in the presence of sodium methoxide, giving a fused isoxazolopyridine <B>3</B>, participated by two molecules of malononitrile, along with the conventional isoxazole <B>2</B>. Similar concomitant formation of <B>7</B> and the fused pyrazolopyridines <B>8</B> was also recognized from the hydrazonoyl bromides <B>6</B> and their product ratio was found to depend on the reaction conditions, particularly on the concentration of malononitrile used.

• 公益社団法人 日本化学会の論文

著者

• Maeno Seiji

  Department of Industrial Chemistry, College of Technology, Seikei University

関連論文

• Reactions of trifluoroacetonitrile oxide or -nitrilimines with .BETA.-diketones and .BETA.-keto esters.
• Behavior of trifluoroacetohydrazonoyl bromide in basic media.
• A novel route to N-phenyl-C-(trifluoromethyl)nitrilimine from 3-phenyl-5-trifluoromethyl-2,3-dihydro-1,3,4,2-oxadiazaphosphole.
• An unusual cyclization of trifluoroacetohydroximoyl and -hydrazonoyl bromides with malononitrile.

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