Phosphine-Catalyzed [2 + 4] Annulation of Allenoates with Thiazolone-Derived Alkenes: Synthesis of Functionalized 6,7-Dihydro-5<i>H</i>-pyrano[2,3-<i>d</i>]thiazoles
作者:Chang Wang、Zhenzhen Gao、Leijie Zhou、Chunhao Yuan、Zhanhu Sun、Yumei Xiao、Hongchao Guo
DOI:10.1021/acs.orglett.6b01571
日期:2016.7.15
Phosphine-catalyzed [2 + 4] annulation of allenoates with thiazolone-derived alkenes has been achieved under mild conditions, giving biologically important 6,7-dihydro-5H-pyrano[2,3-d]thiazole derivatives in high to excellent yields. With the use of Kwon’s phosphine as the chiral catalyst, optically active products were obtained in good yields with excellent enantioselectivities.
在温和的条件下实现了膦催化的脲基酮衍生的烯醇酸酯的[2 + 4]环化反应,从而以高收率或优异的收率获得了生物学上重要的6,7-二氢-5 H-吡喃并[2,3- d ]噻唑衍生物。 。通过使用Kwon的膦作为手性催化剂,以良好的收率和优异的对映选择性获得了光学活性产物。