Rhodium-Catalyzed Cross-Cyclotrimerization and Dimerization of Allenes with Alkynes
作者:Kazuki Sakashita、Yu Shibata、Ken Tanaka
DOI:10.1002/anie.201602155
日期:2016.6.1
It has been established that a cationicrhodium(I)/binapcomplex catalyzes the cross‐cyclotrimerization of two molecules of a monosubstituted allene with one molecule of a functionalized alkyne to give 3,6‐dialkylidenecyclohex‐1‐enes. In contrast, the reactions involving di‐ or trisubstituted allenes and/or unfunctionalized alkynes afforded cross‐dimerization products, substituted dendralenes, through
Peterson Allenation Using (<i>Z</i>)-(1-Lithio-1-alkenyl)trimethylsilanes
作者:Takeshi Takeda、Akira Tsubouchi、Takashiro Kira
DOI:10.1055/s-2006-951474
日期:2006.9
Lithium alkoxides of β-silylallylic alcohols underwent the Peterson elimination in DMF to give allenes. Allenes were also directly obtained by a Peterson allenation reaction from carbonyl compounds using (Z)-(1-lithio-1-alkenyl)trimethylsilanes in one pot.