Synthesis and transformations of 2,4-dioxa- and 2,4-diazaspiro[5.5]undecanones equipped with a diterpenoid substituent
作者:M. E. Mironov、E. E. Shults
DOI:10.1007/s11172-023-4047-z
日期:2023.10
5]undecane-1,5,9-triones by the l-proline catalyzed three-component Knoevenagel—Diels—Alder reaction of diterpenoid enone, aldehyde, and the Meldrum’s acid were proposed. A diterpenoid analog of anticancer agents with an 11-(biphenyl-4-yl)-2,4-di-oxaspiro[5.5]undecanone substituent was synthesized by the Suzuki reaction of the obtained bromophenyl-substituted spirocyclic ketone with 3,4,5-(trimethoxyphenyl)boronic
16-(3-三甲基甲硅烷氧基丁二烯基)呋喃二环己烷类化合物与5-亚甲基(亚芳基)-3,3-二甲基-2,4-二恶烷-1,5-二酮或5-亚甲基(亚芳基)-1,3的Diels-Alder反应-二甲基嘧啶-2,4,6(1 H ,3 H ,5 H )-三酮在l-脯氨酸存在下区域选择性地进行并产生7-呋喃萜基取代的3,3-二甲基-2,4-二氧杂螺[5.5 ]-十一烷-1,5,9-三酮或2,4-二甲基-2,4-二氮杂螺[5.5]十一烷-1,3,5,9-四酮。L-脯氨酸催化二萜烯酮、醛和Meldrum's三组分Knoevenagel-Diels-Alder反应一锅合成萜基取代的二氧杂螺-[5.5]十一烷-1,5,9-三酮的条件提出了酸。通过所得溴苯基取代螺环酮与 3,4,5 的 Suzuki 反应合成了具有 11-(联苯-4-基)-2,4-二氧杂螺[5.5]十一烷酮取代基的抗癌剂二萜类似物-(三甲氧基苯基)硼酸。