Synthesis of condensed tricyclic pyrazolo[3,4-<i>b</i>]thieno[2,3-<i>d</i>]pyridine and related isostere derivatives
作者:Alcione S. De Carvalho、Carlos A. M. Fraga、Eliezer J. Barreiro
DOI:10.1002/jhet.5570330216
日期:1996.3
report the synthesis of an isosteric series of new heterotricyclic derivatives, corresponding to pyrazolo[3,4-b]thieno[2,3-d]pyridine (1), pyrazolo[3,4-b]furano[2,3-d]pyridine (2) and pyrazolo[3,4-b]pyrrolo[2,3-d]pyridine (3). These functionalized compounds were obtained, in high overall yield, by an ‘one-pot’ reaction of the chloroester intermediate 4, possessing the pyrazolo[3,4-b]pyridine system, with
在本文中,我们报告了一个等规系列新杂三环衍生物的合成,分别对应于吡唑并[3,4- b ]噻吩并[2,3-d]吡啶(1),吡唑并[3,4- b ]呋喃并[2] ,3- d ]吡啶(2)和吡唑并[3,4- b ]吡咯并[2,3- d ]吡啶(3)。这些官能化的化合物以高总收率通过含吡唑并[3,4- b ]吡啶体系的氯酯中间体4与适当的α-杂乙酰基酯衍生物的“一锅法”反应制得。 SNAr / Dieckman环化型连续反应。