Et<sub>3</sub>B Induced Stereoselective Radical Addition of Ph<sub>3</sub>GeH to Carbon–Carbon Multiple Bonds and Its Application to Isomerization of Olefins
Triphenylgermane easily adds to acetylenes or terminal olefins in the presence of Et3B to give alkenyltriphenylgermane or alkyltriphenylgermane respectively under excellent control of regio- and stereoselectivities. While Et3B catalyzed addition of Ph3GeH to 1-dodecyne at −78 °C affords (Z)-1-triphenygermyl-1-dodecene exclusively, the addition of Ph3GeH at 60 °C provides (E)-1-triphenylgermyl-1-dodecene
Triphenylgermane adds easily to acetylenes in the presence of Et3B to give (E)- or (Z)-alkenyltriphenylgermanes, respectively, under excellent control of regio- and stereoselectivities.
Some unusual aspect aspects of organocopper chemistry: lithium organocuprate reaction with some neopentylic p-tosylate esters
作者:Gary H. Posner、Kevin A. Babiak
DOI:10.1016/s0022-328x(00)92356-8
日期:1979.9
Diphenylcopperlithium and dimethylcopperlithium react differently with the same primary neopentylic tosylate ester. Several secondary neopentylic tosylates react with organocopperlithium reagents to give olefins via a concerted anti-1,2-dehydrosulfonation. When anti-elimination is not possible, skeletal rearrangement occurs.
Stereoselective formation of (E)-olefins by hydrolytic desulphinylation of some substituted 4-(2′-alkenesulphinyl)-morpholines
作者:Jean-Bernard Baudin、Sylvestre A. Julia
DOI:10.1016/s0040-4039(00)99626-6
日期:1989.1
The boron trifluoride-etherate catalysed hydrolysis of the title sulphinamides provide olefins with (E:Z)-ratios depending on the nature of the substituents on the allylic chain.