Iron(III) Chloride/Phenylsilane‐Mediated Cascade Reaction of Allyl Alcohols with Maleimides: Synthesis of Poly‐Substituted γ‐Butyrolactones
作者:Hua Zhang、Xiao‐Yu Zhan、Xu‐Ling Chen、Lei Tang、Shuai He、Zhi‐Chuan Shi、Yu Wang、Ji‐Yu Wang
DOI:10.1002/adsc.201900843
日期:2019.11.5
A iron‐catalyzed free radical cascade reaction of allyl alcohols with N‐substituted maleimides for accessing poly‐substituted γ‐butyrolactones has been developed. In this protocol, various allyl alcohols can open N‐substituted maleimide rings to form allyl ester intermediates, and the allyl ester intermediates can be converted into an allyl ester alkyl radicals and undergo intramolecular free radical
Facile Construction of Benzo[<i>d</i>][1,3]oxazocine: Reductive Radical Dearomatization of <i>N</i>-Alkyl Quinoline Quaternary Ammonium Salts
作者:Fu-Yu Li、Yao Xiao、Dong-Wei Huang、Meng Luo、Lu Li、Hong Xu、Bei Wang、Ji-Yu Wang
DOI:10.1021/acs.orglett.3c04243
日期:2024.3.15
Reductive radical dearomatization N-alkyl quinoline quaternary ammonium salts to synthesize structurally complex and challenging polysubstituted benzo[d][1,3]oxazocines was first reported. The mechanism showed various allyl alcohols can be converted into alkyl radicals under reduction conditions of iron/silane. These radicals then nucleophilically attack the C4 site of N-alkyl quinoline quaternary
首次报道了还原自由基脱芳构化N-烷基喹啉季铵盐合成结构复杂且具有挑战性的多取代苯并[ d ][1,3]恶佐辛。该机理表明,在铁/硅烷的还原条件下,各种烯丙醇可以转化为烷基自由基。然后这些自由基亲核攻击N-烷基喹啉季铵盐的C4位点,所得中间体的分子内环化生成目标产物。该方法不仅制备了一系列新型多取代苯并[ d ][1,3]恶唑嗪化合物,而且还制备了多环苯并[ d ][1,3]恶唑嗪化合物。最后,该策略弥补了N-烷基喹啉鎓盐还原自由基报道的不足,同时具有反应条件温和、底物范围广、产物结构新颖等优点。
CN115594653
申请人:——
公开号:——
公开(公告)日:——
Nazarov Cyclization of Divinyl and Arylvinyl Epoxides: Application in the Synthesis of Resveratrol-Based Natural Products
作者:Gangarajula Sudhakar、Kovela Satish
DOI:10.1002/chem.201500362
日期:2015.4.20
New variation in the Nazarovcyclization has been developed by preparing divinyl and arylvinyl epoxides as pentadienyl cation precursors for the first time. Highly substituted cyclopentadienes, hydrindienes, and indenes were synthesized to demonstrate the compatibility of this reaction with substrates bearing a variety of substitutions and having different types of epoxides. Application of this method