Highly Efficient Synthesis of Multisubstituted 2-Acyl Furans via PIFA/I2-Mediated Oxidative Cycloisomerization of cis-2-En-4-yn-1-ols
作者:Yuanhong Liu、Xiangwei Du、Haoyi Chen、Yifeng Chen、Jingjin Chen
DOI:10.1055/s-0030-1259717
日期:2011.4
using a combination of hypervalent iodine(III) reagent, molecular iodine, and a base. This method offers an efficient synthesis of 2-acyl furans with diverse substitution patterns in a regioselective manner under mild reaction conditions. A mechanistic proposal for these transformations involving alkyne activation by trifluoroacetylhypoiodite generated in situ is presented.
使用高价碘 (III) 试剂、分子碘和碱的组合开发了顺式烯醇的新型氧化环异构化。该方法在温和的反应条件下以区域选择性的方式有效合成了具有不同取代模式的 2-酰基呋喃。提出了这些转化的机制建议,这些转化涉及原位生成的三氟乙酰基次碘化物对炔烃的活化。