Synthesis of Aminophenanthrenes and Benzoquinolines via Hauser–Kraus Annulation of Sulfonyl Phthalide with Rauhut–Currier Adducts of Nitroalkenes
作者:Tarun Kumar、Vaijinath Mane、Irishi N. N. Namboothiri
DOI:10.1021/acs.orglett.7b01924
日期:2017.8.18
The Hauser–Kraus reaction of sulfonyl phthalide with nitroalkene derivatives provides access to aminophenanthrenes, including phenanthrene-substituted amino acids and benzoquinolines. The intermediate quinones bearing a key ketoalkyl moiety undergoes facile intramolecular enamine cyclization. Interestingly, enaminesderivedfrom primary and secondary amines undergo cyclization via C-centered nucleophilic
One-pot regioselective synthesis of functionalized and fused furans from Morita–Baylis–Hillman and Rauhut–Currier adducts of nitroalkenes
作者:Vaijinath Mane、Tarun Kumar、Sourav Pradhan、Savita Katiyar、Irishi N. N. Namboothiri
DOI:10.1039/c5ra11471c
日期:——
Highly functionalized and fused furans have been synthesized via cascadereactions of Morita–Baylis–Hillman and Rauhut–Currier adducts of nitroalkenes with active methylene compounds. The reactions involving SN2′-intramolecular Michael addition or Michael addition-intra-molecular nucleophilic substitution take place in a regioselective manner to afford synthetically and biologically useful furans in
通过Morita–Baylis–Hillman和Rauhut–Currier硝基烯烃与活性亚甲基化合物的加成反应,可以合成高度官能化和熔融的呋喃。涉及S N 2'-分子内迈克尔加成或迈克尔加成-分子内亲核取代的反应以区域选择性方式发生,以中等至良好的产率提供合成和生物学上有用的呋喃。