Neighboring Effect of Intramolecular Chlorine Atoms on Epoxide Opening Reaction by Chloride Anions
作者:Taiki Umezawa、Masayuki Shibata、Ryutaro Tamagawa、Fuyuhiko Matsuda
DOI:10.1021/acs.orglett.9b02624
日期:2019.10.4
We investigated the diastereoselectivity of ring openings for chloro vinyl epoxides with various chlorination reagents. In the chlorinolysis reactions using vinyl epoxides having an allyl alcohol, inversion:retention ratios varied depending on the chloride sources. In limited cases, the increase in retention ratio was consistent with the intervention of chloronium ions. In contrast, all vinyl epoxides
我们用各种氯化试剂研究了环开口对氯乙烯环氧化物的非对映选择性。在使用具有烯丙醇的乙烯基环氧化合物的氯化分解反应中,转化率:保留率根据氯化物来源而变化。在有限的情况下,保留率的增加与氯鎓离子的干预一致。相反,所有带有α,β-不饱和酯的乙烯基环氧化物仅给出转化产物。这些结果表明吸电子性能抑制了氯离子。