Synthesis and Applications of Tetrahydro-2-pyridinones via aza-Diels-Alder Reactions of Thio-substituted 1,3-Dienes with Arylsulfonyl Isocyanates
作者:Shang-Shing Chou、Chia-Cheng Hung
DOI:10.1055/s-2001-18710
日期:——
The first aza-Diels-Alder reactions of arylsulfonyl isocyanates with thio-substituted 1,3-dienes via the 3-sulfolene precursors 1 gave the cyclized products 3 with complete control of chemo- and regioselectivity. The cyclized products 3a and 5 underwent further reactions with nucleophiles and bases to give useful heterocyclic compounds. The N-tosyl group of the cyclic products could be selectively replaced by hydrogen or another substituent.
芳基磺酰基异氰酸与硫取代的1,3-二烯通过3-砜基烯前体1进行的首批aza-Diels-Alder反应,完全控制了化学选择性和区域选择性地得到了环化产物3。环化产物3a和5与亲核试剂和碱进一步反应,生成了有用的杂环化合物。环状产物的N-对甲苯磺酰基可以被选择性地替换为氢或其他取代基。