作者:Tatsiana Haidzinskaya、Hilary A. Kerchner、Jixin Liu、Mary P. Watson
DOI:10.1021/acs.orglett.5b01838
日期:2015.8.7
We have developed a bromination/alkynylation sequence that enables efficient transformation of simple cyclic enol ethers to difunctionalized products. The success of this strategy relies on a highly diastereselective, zinc-catalyzed addition of terminal alkynes to α-bromo oxocarbenium ions, formed in situ via ionization of acetal precursors. Using this method, trans-α-alkynyl-β-halo pyran and furan
我们已经开发了一种溴化/炔基化序列,可以将简单的环状烯醇醚有效转化为双官能化产物。该策略的成功依赖于末端乙炔的高度非对映选择性,锌催化加成反应,该炔烃通过乙缩醛前体的电离作用原位形成。使用这种方法,可以制备具有高非对映选择性和优异的官能团耐受性的反式α-炔基-β-卤代吡喃和呋喃衍生物。