efficient cross aldol additions between different ketones and between ketones and aldehydes, in good to excellent yields with high syn-stereoselectivities. As an extension, direct Claisen condensation between methyl esters was also promoted by TiCl4/Bu3N with 0.05 equiv of TMSOTf co-catalyst.
的TiCl 4 /卜3 Ñ进行不同
酮类之间和酮和醛,在良好的以高优异的产率之间高效交叉醛醇添加顺-stereoselectivities。此外,TiCl 4 / Bu 3 N与0.05当量的TMSOTf助催化剂还促进了甲酯之间的直接Claisen缩合反应。