(1-Diazo-2-oxoalkyl)silanes 1 react with a 3-phenyl-3H-1,2,3,4-triazaphosphole (3) to form dispiroannulated 1,3-diaza-2,4-diphosphetidines 4. With 3-alkoxycarbonyl-3H-1,2,3,4-triazaphospholes 5, 4-alkoxy-4-isocyanato-1,2,4(lambda(5))-diazaphospholes 6 are obtained. The structures of 4a and 6c were established by X-ray crystal structure analysis. It is proposed that 4-imino-1,2,4(lambda(5))-diazaphospholes are the immediate precursors of both types of products. (C) 1999 Elsevier Science Ltd. All rights reserved.
(1-二氮-2-氧代烷基)
硅烷1与3-苯基-3H-1,2,3,4-三氮
磷杂环(3)反应生成二螺旋烷合1,3-二氮-2,4-二
磷杂环𬭩盐4。与3-烷氧基羰基-3H-1,2,3,4-三氮
磷杂环(5)反应,得到4-烷氧基-4-
异氰酸酯基-1,2,4(λ⁵)-二氮
磷杂环6。通过X射线晶体结构分析确定了4a和6c的结构。推测4-亚
氨基-1,2,4(λ⁵)-二氮
磷杂环是生成两种产物的直接前体。(C)1999 Elsevier Science Ltd. 保留所有权利。