Preparation of E-α-stannyl-β-trimethylsilylethynylacrylate, building block for polyconjugated ylidenebutenolide and its derivatives, by novel E-selective ethynylstannylation of propiolate
                                
                                    
                                        作者:Naoto Kinashi、Kazuhiko Sakaguchi、Shigeo Katsumura、Tetsuro Shinada                                    
                                    
                                        DOI:10.1016/j.tetlet.2015.11.079
                                    
                                    
                                        日期:2016.1
                                    
                                    E-alpha-Stannyl-beta-trimethylsilylethynylacrylates, which are effective building blocks for the polyconjugated ylidenebutenolides and its modified derivatives, were directly synthesized via novel E-selective ethynylstannylation of propiolic acid esters. These building blocks were applied to the syntheses of the ylidenebutenolide segment in the previous peridinin synthesis and a short chain Z-eneyne ester derivative, by the sequential Stille and Sonogashira couplings with the corresponding epoxide and vinyl iodide segments. (C) 2015 Elsevier Ltd. All rights reserved.