Synthesis of the decalin core of codinaeopsin via an intramolecular Diels–Alder reaction
作者:Mani Ramanathan、Chun-Jui Tan、Wen-Jung Chang、Hui-Hsu Gavin Tsai、Duen-Ren Hou
DOI:10.1039/c3ob40480c
日期:——
the synthesis of the decalin core of codinaeopsin (1), a tryptophan-polyketide hybrid natural product with promising antimalarial activity (IC50 4.7 μM, against Plasmodium falciparum), via an intramolecular Diels–Alder (IMDA) reaction. A convergent synthesis was developed to prepare the precursors for the IMDA reaction in 10 steps. The exo cycloadducts were derived from thermal, IMDA reactions of the
我们通过分子内Diels-Alder(IMDA)反应描述了codinaeopsin(1)的十氢化萘核心的合成,codinaeopsin(1)是一种色氨酸-聚酮化合物杂合天然产物,具有良好的抗疟活性(IC 50 4.7μM ,对抗恶性疟原虫)。进行了收敛合成,以十个步骤制备用于IMDA反应的前体。所述外切cycloadducts从含有Weinreb酰胺或酯共轭亲双烯体的基板的热,IMDA反应衍生的内切加合物是来自路易斯酸促进了基材的反应与甲酰基。无论外型和内IMDA的产物仅通过NMR光谱进行分离和表征。用X射线晶体学进一步证实了一个内环加合物。理论计算揭示了十氢化萘核心的取代基对IMDA工艺的影响。