Department of Chemistry, Indian Institute of Technology Bombay , Mumbai 400076, India.
J Org Chem. 2017 Dec 1;82(23):12939-12944. doi: 10.1021/acs.joc.7b02656. Epub 2017 Nov 20.
The Hauser-Kraus annulation of sulfonylphthalide with 3-olefinic oxindole has been performed. This strategy, which involves a cascade Michael addition-Dieckmann cyclization-elimination sequence, offers rapid and convenient access to novel spiro-dihydronaphthoquinone-oxindoles in excellent yields with complete selectivity for the enolic form under mild reaction conditions.
磺酰基苯并呋喃与 3-烯基吲哚的豪泽-克劳修斯环加成已经完成。这种策略涉及串联迈克尔加成-迪克曼环化-消除序列,在温和的反应条件下,以优异的收率和完全的对烯醇形式的选择性,为新型螺二氢萘醌-吲哚提供了快速便捷的途径。