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 Claisencondensation 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。
Direct, practical, and powerful crossed aldol additions between ketones and ketones or aldehydes utilizing environmentally benign TiCl4–Bu3N reagent
benign method is advantageous from a green chemical viewpoint with regard to yield, substrates variation, reagent availability, and simple procedures. This method was applied to a short step formal synthesis of (R)-muscone, a natural macrocyclic musk.