Allene Cross-Metathesis: Synthesis of 1,3-Disubstituted Allenes
摘要:
[GRAPHICS]Grubbs catalyst, Cl-2(Cy3P)(2)Ru=CHPh, was found to catalyze the cross-metathesis of monosubstituted allenes to 1,3-disubstituted allenes in varying yields.
Nickel(0)-Mediated Sequential Addition of Carbon Dioxide and Aryl Aldehydes into Terminal Allenes
作者:Masanori Takimoto、Mitsunobu Kawamura、Miwako Mori
DOI:10.1021/ol034480l
日期:2003.7.1
[GRAPHICS]Nickel-mediated sequential addition of carbon dioxide and aryl aldehydes into terminal allenes; is reported. The reaction proceeded in a diastereoselective manner to afford alpha-methylene-gamma-hydroxy carboxylic acids, which allowed stereoselective preparation of cis-beta,gamma-disubstituted alpha-methylene-gamma-lactones.