Cross-Metathesis Reactions of Homoallyl Methyl Malonates with Sterically Hindered Allylic Esters
作者:Fabio Barile、Mauro Bassetti、Andrea D'Annibale、Renzo Gerometta、Michele Palazzi
DOI:10.1002/ejoc.201100916
日期:2011.11
The methyl malonate esters of 3-buten-1-ol and 2-methyl-3-buten-1-ol can be coupled efficiently to different methallylic esters in the presence of the second-generation Grubbs catalyst to yield trisubstituted olefins by the cross-metathesis reaction. Product selectivity and yields depend on the relative amounts of reagents and to a minor extent on the methallylic ester functional group. Alkyl substituents
3-丁烯-1-醇和2-甲基-3-丁烯-1-醇的丙二酸甲酯在第二代Grubbs催化剂存在下可与不同的甲基烯丙酯有效偶联,通过交联反应生成三取代烯烃。复分解反应。产物选择性和产率取决于试剂的相对量,并在较小程度上取决于甲基烯丙基酯官能团。烯丙基或孪晶位置的烷基取代基显着影响产物产率和 E/Z 立体选择性。