New Synthetic Approach to 4-(3-Aminopropyl)-5-amino-1-methylpyrazole Starting from 3-Cyanopyridine
作者:Atsushi Ohigashi、Kiyoshi Temmaru、Norio Hashimoto
DOI:10.1021/op0501996
日期:2006.1.1
regioselective enamine exchange with N-methylhydrazine and 1,4,5,6-tetrahydro-pyridine-3-carbonitrile (8), followed by a subsequently occurring intramolecular cyclization and aromatization, starting from a cheap 3-cyanopyridine (7).
为4-(合成短,实用的方法Ñ -Boc-3-氨基丙基)-5-(Ñ -tritylamino)-1-甲基吡唑(3),抗侧链绿脓杆菌头孢菌素FR259647,1,是通过利用与N-甲基肼和1,4,5,6-四氢吡啶-3-甲腈的区域选择性烯胺交换(8)建立,随后进行随后的分子内环化和芳构化,从廉价的3-氰基吡啶(7)。