The firstexamples of successful anionic oxy-ene reactions are reported. The corresponding reactions 1615 (Li+ as counter ion) and 1821 (K+ as counter ion) proceeded with good yields and high diastereoselectivities. In the latter case, the reaction proceeds under very mild conditions (3 h reflux in toluene) in 65% yield with more than 96% d/s. However, when the phosphazene base P4-(t-Bu) was allowed
Fe(III)-Triggered Radical Arylation of Arene Moieties from Cyclopropanols to Construct Dibenzocyclohepta/octanones: Synthesis of N-Acetylcolchinol-O-methyl ether
作者:Zelin Xu、Meichen Zhou、Yuer Feng、Ziyu Han、Yaoyao Li、Guang Yang、Xin Wang、Kun Zhang、Shuangwei Liu
DOI:10.1021/acs.orglett.4c02047
日期:2024.8.23
6-8-6 carbon ring systems are present in numerous biologically active natural molecules. However, simple and efficient synthetic approaches to these scaffolds remain challenging. Herein, we report a versatile strategy for constructing these ring systems via Fe(NO3)3-triggered radical arylation of arenes starting from cyclopropanols. This synthetic utility has been demonstrated in the synthesis of the natural