Study of the heterocyclization of<i>vic</i>-substituted hydrazides of acetylenylpyrazolecarboxylic acids into<i>N</i>-amino pyrazolopyridinones
作者:Sergei F. Vasilevsky、Elena V. Mshvidobadze、José Elguero
DOI:10.1002/jhet.5570390617
日期:2002.11
3-c]pyridin-4-ones 4 and N-amino pyrazolo[3,4-c]pyridin-4-ones 8 from vic-acetylenyl/hydrazido pyrazoles. The procedure involves the intermediate synthesis of methyl esters of acetylenyl-pyrazole carboxylic acids and the subsequent cyclization under a variety of conditions.
我们报告一个新的和有效的方法来制备ñ -氨基吡唑并[4,3- c ^ ]吡啶-4-酮4和ñ -氨基吡唑并[3,4- c ^ ]吡啶-4-酮8从VIC -acetylenyl /酰肼基吡唑类。该方法涉及乙炔基-吡唑羧酸的甲酯的中间合成和随后在多种条件下的环化。