Further intramolecular reactions of 1,2,4-triazines. Synthesis of furo[2,3-]pyridines and dihydropyrano[2,3-]pyridines
作者:Edward C. Taylor、John E. Macor
DOI:10.1016/s0040-4039(00)85497-0
日期:1986.1
3-(3-Butynyloxy)- and 3-(4-pentnyloxy)-1,2,4-triazines undergo facile intramolecular Diels-Alder reactions to yield 2,3-dihydrofuro(2,3-)pyridines and dihydropyrano(2,3-)pyridines respectively. The former are readily dehydrogenated with DDQ to furo(2,3-)pyridines.
3-(3-丁炔
氧基)-和3-(4-戊
氧基)-
1,2,4-三嗪容易发生分子内Diels-Alder反应,生成
2,3-二氢呋喃(2,3- )
吡啶和二
氢吡喃(2, 3- )
吡啶。前者很容易用
DDQ脱氢为
呋喃(2,3- )
吡啶。