Highly Stereoselective Synthesis of Functionalized β,β-Di- and Trisubstituted Vinylic Sulfoxides by Cu-Catalyzed Conjugate Addition of Organozinc Reagents
作者:Naoyoshi Maezaki、Hiroaki Sawamoto、Tomoko Suzuki、Ryoko Yoshigami、Tetsuaki Tanaka
DOI:10.1021/jo048747l
日期:2004.11.1
β,β-Disubstituted chiral vinylic sulfoxides bearing functionalities have been synthesized via Cu-catalyzed conjugate addition of organozinc reagents to chiral 1-alkynyl sulfoxides. Due to the availability of functionalized organozinc reagents and high syn-selectivity of the reaction, both geometric β,β-disubstituted vinylic sulfoxides were selectively synthesized. Furthermore, 1-alkynyl sulfoxides
通过将有机锌试剂的铜催化共轭加成到手性1-炔基亚砜上,合成了带有官能团的β,β-二取代的手性乙烯基亚砜。由于官能化的有机锌试剂的可获得性和反应的高顺选择性,因此选择性地合成了两种几何的β,β-二取代的乙烯基亚砜。此外,通过用亲电子试剂捕获所得的α-亚磺酰基乙烯基碳负离子,将1-炔基亚砜衍生为三取代的乙烯基亚砜。高度非对映选择性的THF和THP环形成是通过这种方法完成的,然后进行了分子内迈克尔加成。