Zong Jiarui, Christensen Kirsten E, Robertson Jeremy
Department of Chemistry, University of Oxford, Chemistry Research Laboratory, Mansfield Road, Oxford OX1 3TA, United Kingdom.
Org Lett. 2024 Mar 1;26(8):1556-1560. doi: 10.1021/acs.orglett.3c04199. Epub 2024 Feb 19.
A short route from dihydrocarvone is described, which led to the tetracarbocyclic core common to artatrovirenol A and B and daphnenoid A. A variant of this route afforded guaia-4,6-dien-3-one (from ) and its epimer. From 2-(2-oxoethyl)furan, a 15-step sequence then delivered the complete carbon skeleton and all functionality necessary for daphnenoid A. Key steps in the route include diastereoselective intramolecular oxidopyrylium cycloaddition, oxa-bridge cleavage under "push-pull" conditions, and intramolecular Diels-Alder cycloaddition.
描述了一条从二氢香芹酮出发的短路线,该路线通向阿托维罗醇A和B以及瑞香素A共有的四环核心。此路线的一个变体得到了愈创木-4,6-二烯-3-酮(由……得到)及其差向异构体。从2-(2-氧代乙基)呋喃出发,一个15步的序列随后构建出了瑞香素A完整的碳骨架和所有必需的官能团。该路线中的关键步骤包括非对映选择性分子内氧化吡啶鎓环加成、“推-拉”条件下的氧桥裂解以及分子内狄尔斯-阿尔德环加成。