Use of alkyl 2,4,6-triisopropylbenzoates in the asymmetric homologation of challenging boronic esters
作者:Robin Larouche-Gauthier、Catherine J. Fletcher、Irantzu Couto、Varinder K. Aggarwal
DOI:10.1039/c1cc14469c
日期:——
(-)-Sparteine induced lithiation of primary 2,4,6-triisopropylbenzoates and subsequent homologation of boronic esters is reported. A comparative study with lithiated N,N-diisopropylcarbamates has demonstrated the superiority of the hindered benzoate.
报道了 (-)-Sparteine 诱导的主要 2,4,6-三异丙基苯甲酸酯的锂化和随后的硼酸酯的同系化。与锂化 N,N-二异丙基氨基甲酸酯的比较研究证明了受阻苯甲酸酯的优越性。