Highly Selective Electrophile-Induced Cascade Reactions between<i>o</i>-Alkynylbenzaldehydes and Styrene Oxides Leading to the Formation of 1-Naphthyl Ketones
作者:Nitin T. Patil、Ashok Konala、Vipender Singh、Vaddu V. N. Reddy
DOI:10.1002/ejoc.200900809
日期:2009.10
for the synthesis of naphthalene derivatives through reaction of o-alkynylbenzaldehydes and styrene oxides in the presence of molecular iodine was developed. The reaction involves Meinwald rearrangement of styrene oxides to form the corresponding aryl acetaldehydes. The enol forms of aryl acetaldehydes might undergo [4+2] benzannulation reactions with iodinated benzopyrilium ions, formed in situ from
开发了一种在分子碘存在下通过邻炔基苯甲醛和氧化苯乙烯反应合成萘衍生物的有效方法。该反应涉及氧化苯乙烯的迈因瓦尔德重排以形成相应的芳基乙醛。芳基乙醛的烯醇形式可能会与碘化苯并吡咯鎓离子发生 [4+2] 苯并环化反应,碘化苯并吡咯鎓离子由邻炔基苯甲醛和碘原位形成,得到 1-萘基酮。发现该反应具有高度选择性,并且在两种可能的产物中,仅形成一种。讨论了机械方面。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)