3,4-Disubstituted Δ3-pyrrolin-2-ones were prepared in high yields via 5-tosyl-Δ3-pyrrolin-2-ones (4) starting from 2-tosylpyrroles regioselectively. The compounds 4 were found to be useful intermediates for the preparation of a variety of Δ3-pyrrolin-2-one derivatives. The reactions of 4 with various nucleophiles and active methylene compounds bearing an appropriate leaving group are described.
通过 5-tosyl-Δ3-pyrrolin-2-ones (4) 从 2-tosylpyrroles 开始区域选择性地制备 3,4-二取代的 Δ3-pyrrolin-2-ones。发现化合物4是用于制备多种Δ
3-吡咯啉-2-酮衍
生物的有用中间体。描述了 4 与各种亲核试剂和带有适当离去基团的活性亚甲基化合物的反应。