Periplanone total synthesis via intramolecular pinacol coupling
作者:John E. McMurry、Nathan O. Siemers
DOI:10.1016/s0040-4039(00)60712-8
日期:1994.6
We have carried out an enantioselective synthesis of (-)-periplanone C by a route involving titanium-induced, intramolecularpinacolcoupling reaction of a 1,10 keto aldehyde as the key step. The coupling occurs with predictable stereochemistry to give a mixture of two diol products in greater than 60% yield.
A formal [2 + 2 + 2] cycloaddition reaction between a 1,3-dione, an olefin, and molecular oxygen mediated by light is reported, which delivers endoperoxides in good yield through the formation of two C–O and one C–C bond in one step. The resulting 1,2-dioxanes are stable compounds and can be further derivatized at the hemiacetal position via alkylation or acetylation. All compounds have been evaluated
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。
Identification of an Asexual Reproduction Inducer of Phytopathogenic and Toxigenic
<i>Fusarium</i>
configuration, of Fusarium asexual reproduction inducer (FARI), a new sesquiterpene derivative, by spectroscopic analysis, total synthesis, and conidium‐inducing assays of synthetic isomers. We have also uncovered the universality of FARI among Fusarium species. Moreover, a mechanism‐of‐action study suggested that the Gpmk1 and LaeA signaling pathways are required for conidium formation induced by FARI; conversely
Synthesis of (−)-Cotylenol, a 14-3-3 Molecular Glue Component
作者:Stephen I. Ting、Dylan W. Snelson、Tucker R. Huffman、Akihiro Kuroo、Ryota Sato、Ryan A. Shenvi
DOI:10.1021/jacs.3c07849
日期:2023.9.20
Small molecules that modulate the 14-3-3 protein–protein interaction (PPI) network represent valuable therapeutics and tool compounds. However, access has been lost to 14-3-3 PPI molecular glues of the cotylenin class, leading to investigations into the practical chemical syntheses of congeners and analogues. Here we report a concise synthesis of (−)-cotylenol via a 10-step asymmetric entry into a