This work highlights the use of 3-vinyl-1,2,4-triazines as original thia-Michael acceptors and inverse electron demanding Diels-Alder platforms en route to new 7,8-dihydro-5H-thiopyrano[4,3-b]pyridines. The required but rather unstable propargylthiol nucleophiles were successfully generated in-situ upon an innovative DBU-catalyzed methanolysis event of the corresponding propargyl thioacetate derivatives
                                    这项工作强调了将3-
乙烯基-
1,2,4-三嗪用作原始的thia-Michael受体和要求反电子的Diels-Alder平台,用于新的7,8-dihydro-5 H -thiopyrano [4,3- b ]
吡啶。所需但相当不稳定的炔丙基
硫醇亲核试剂是在相应的炔丙基
硫代乙酸酯衍
生物的创新性
DBU催化
甲醇分解事件中成功地原位生成的。