Formation of Carbon Quaternary Stereogenic Center in Acyclic Systems via a Sequence of Carbometalation–Intramolecular Cyclization–Silicon Activation
作者:Maya Preshel-Zlatsin、Fa-Guang Zhang、Guillaume Eppe、Ilan Marek
DOI:10.1055/s-0035-1561666
日期:2016.10
carbometalation reaction of cyclopropenyl esters followed by reaction with acylsilanes provides γ-silylated lactones that undergo a ‘sila-Grob’ fragmentation to give pyrone enolates as a new source of acyclic δ-diketones, δ-keto acid, and δ-keto ester derivatives possessing a quaternary stereocenter. The diastereoselective carbometalation reaction of cyclopropenyl esters followed by reaction with acylsilanes
致力于纪念让·诺曼特(Jean Normant),他是一位出色的老师和真正鼓舞人心的同事 抽象的 环丙烯基酯的非对映选择性碳金属化反应,然后与酰基硅烷反应,得到γ-甲硅烷基化的内酯,这些内酯经过“ sila-Grob”裂解生成吡喃酮烯醇酸酯,作为无环δ-二酮,δ-酮酸和δ-酮酯的新来源具有四元立体中心的导数。 环丙烯基酯的非对映选择性碳金属化反应,然后与酰基硅烷反应,得到γ-甲硅烷基化的内酯,这些内酯经过“ sila-Grob”裂解生成吡喃酮烯醇酸酯,作为无环δ-二酮,δ-酮酸和δ-酮酯的新来源具有四元立体中心的导数。