Allenylsilver(I) compounds, prepared in situ by addition of alkylsilver(I)-lithium bromide complexes to butenynes, readily react with a variety of electrophiles. The produced compounds are usually almost pure allenes, but in some cases substantial amounts of the isomeric acetylenes are also formed.
通过将烷基
银(I)-
溴化锂络合物加到
丁烯中原位制备的
烯基
银(I)化合物易于与各种亲电试剂反应。产生的化合物通常是几乎纯的
丙二烯,但是在某些情况下,还会形成大量的异构体
乙炔。