已开发了通过1,3-偶极环加成甲亚胺基团合成功能化的取代吡咯的方法。该方案基于α-亚氨基酯与磺酰基双极性亲和剂的金属催化环加成反应,然后是碱促进的磺酰基基团消除。由1,2-双(磺酰基乙烯),β-磺烯酮和β-磺酰基丙烯酸酯制备了令人满意的各种2,5-二取代的吡咯和2,3,5-和2,4,5-三取代的吡咯。该方法可以以迭代和直接的方式应用于从双吡咯到五吡咯的低聚吡咯的构建。迭代[ n +1]和[ n+2]的方法已经被设计出来,后者涉及从吡咯基的双(亚氨基酸酯)中双1,3-偶极环加成反应。
Design, Sustainable Synthesis, and Programmed Reactions of Templated <i>N</i>-Heteroaryl-Fused Vinyl Sultams
作者:Joydev K. Laha、Shubhra Sharma、Seema Kirar、Uttam C. Banerjee
DOI:10.1021/acs.joc.7b01340
日期:2017.9.15
design and synthesis of N-heteroaryl-fused vinyl sultams as templates for programming chemical reactions on vinyl sultam periphery or (hetero)aryl ring is described. The key features include rational designing and sustainable synthesis of the template, customized reactions of vinyl sultams at C═C bond or involving N–S bond cleavage, and reactions on the periphery of the heteroaryl ring for late-stage