Synthesis of the eight-membered carbocycle of brachialactone by intramolecular Mizoroki-Heck reaction
作者:Yushi Hirata、Atsuo Nakazaki、Toshio Nishikawa
DOI:10.1016/j.tetlet.2021.153608
日期:2022.2
A synthesis of the BC ring moiety of brachialactone, a fusicoccane-type diterpene isolated from the tropical forage grass Brachiaria humidicola and found to inhibit nitrification by soil microbes, is described. Several precursors including the C ring were synthesized from a known chiral cyclopentane, and then subjected to the conditions for the Mizoroki-Heck reaction. Substrates incorporating vinyl
描述了臂内酯的 BC 环部分的合成,臂内酯是一种从热带牧草Brachiaria humidicola中分离出来的一种褐煤型二萜,发现它可以抑制土壤微生物的硝化作用。包括 C 环在内的几种前体由已知的手性环戊烷合成,然后经受 Mizoroki-Heck 反应的条件。含有乙烯基 (R = H) 或烯酮 (R = COCH 3 ) 部分并在 C-2 处含有S构型的底物成功地进行了分子内 Mizoroki-Heck 反应,得到了臂内酯的 BC 环结构。
Strategies for the Synthesis of Fusicoccanes by Nazarov Reactions of Dolabelladienones: Total Synthesis of (+)-Fusicoauritone
作者:David R. Williams、Leslie A. Robinson、C. Richard Nevill、Jayachandra P. Reddy
DOI:10.1002/anie.200603853
日期:2007.1.29
A synthetic pathway leading to (+)-fusicoauritone (1) is highlighted by the use of a Julia condensation for preparation of an eleven-membered dolabelladienone precursor for subsequent Nazarov cyclization to yield the 5-8-5 tricyclic diterpene skeleton.