Experimental and Theoretical DFT Investigations in the [2,3]-Wittig-Type Rearrangement of Propargyl/Allyl-Oxy-Pyrazolones
作者:Lucia De Crescentini、Gianfranco Favi、Giacomo Mari、Gianluca Ciancaleoni、Marcello Costamagna、Stefania Santeusanio、Fabio Mantellini
DOI:10.3390/molecules26216557
日期:——
2-dienyl)1H-pyrazol-5(4H)-ones and 9-alkyl-7-aryl-1-oxa-7,8-diazaspiro[4.4]nona-3,8-dien-6-ones, starting from 1,2-diaza-1,3-dienes (DDs) and propargyl alcohol. The reaction proceeds through a sequence Michael-type nucleophilic attack/cyclization/[2,3]-Wittig rearrangement. In the same way, the reaction between the aforementioned DDs and allyl alcohol furnished 4-allyl-4-hydroxy-3-alkyl-1-aryl-1H-pyrazol-5(4H)-ones
在这里,我们报道了有趣的3-烷基-4-羟基-1-芳基-4-(丙-1,2-二烯基)1 H-吡唑-5(4 H )-酮和9-烷基-7-芳基的合成-1-氧杂-7,8-二氮杂螺[4.4]nona-3,8-二烯-6-酮,由 1,2-二氮杂-1,3-二烯 (DD) 和炔丙醇起始。该反应通过迈克尔型亲核攻击/环化/[2, 3 ]-Wittig 重排序列进行。以同样的方式,上述DD与烯丙醇之间的反应得到4-烯丙基-4-羟基-3-烷基-1-芳基-1H-吡唑-5( 4H )-酮。为了对该机制有决定性的澄清,还进行了 DFT 研究。