Direct access to functionalised allylsilanes: The cerium(III) mediated grignard reaction of functionalised esters and lactones.
作者:Thomas V. Lee、John R. Porter、Frances S. Roden
DOI:10.1016/s0040-4039(00)80666-8
日期:1988.1
(III) chloride alters the chemoselectivity of the reaction of the Grignard reagent (1) with ester-acetals and also greatly improves the efficiency of reaction with lactones. In addition it gives improved preparations of the useful intermediates (8), (11) and (12) giving direct access to valuable functionalised allylsilanes of use in annulation reactions.
氯化铈(III)的使用改变了格氏试剂(1)与酯-缩醛的反应的化学选择性,并且还大大提高了与内酯的反应效率。另外,它提供了有用的中间体(8),(11)和(12)的改进的制备方法,使得可以直接获得用于环化反应的有价值的官能化的烯丙基硅烷。