色满酮内酯二聚体 gonytolide A 的首次合成是利用钒 (V) 介导的单体 gonytolide C 的氧化偶联实现的。采用邻溴封闭基团策略有利于对位偶联并实现 ( ±)-gonytolide C。不对称缀合物还原能够实现手性、外消旋前体的实际动力学拆分以及 (+)-gonytolide A 及其阻转异构体的不对称合成。
Total synthesis of gonytolides C and G, lachnone C, and formal synthesis of blennolide C and diversonol
作者:Gangarajula Sudhakar、Shruthi Bayya、Vilas D. Kadam、Jagadeesh Babu Nanubolu
DOI:10.1039/c4ob00950a
日期:——
The first stereoselective total synthesis of gonytolide C, which is a monomeric unit of an innate immune promoter gonytolide A, has been accomplished from the aldol reaction between acetophenone derived from orcinol and butyrolactone containing α-keto ester followed by the excellent diastereoselective intramolecular cyclization. The first total synthesis of gonytolide G has been achieved by the oxidation
Atropselective syntheses of (−) and (+) rugulotrosin A utilizing point-to-axial chirality transfer
作者:Tian Qin、Sarah L. Skraba-Joiner、Zeinab G. Khalil、Richard P. Johnson、Robert J. Capon、John A. Porco
DOI:10.1038/nchem.2173
日期:2015.3
Chiral, dimeric naturalproducts containing complex structures and interesting biological properties have inspired chemists and biologists for decades. A seven-step total synthesis of the axially chiral, dimeric tetrahydroxanthone naturalproduct rugulotrosin A is described. The synthesis employs a one-pot Suzuki coupling/dimerization to generate the requisite 2,2′-biaryl linkage. Highly selective
A Common<i>C</i><sub>2</sub>‐Symmetric 2,2’‐Biphenol Building Block and its Application in the Synthesis of (+)‐di‐<i>epi</i>‐Gonytolide A
作者:Julian Greb、Till Drennhaus、Moritz K. T. Klischan、Zachary W. Schroeder、Wolfgang Frey、Jörg Pietruszka
DOI:10.1002/chem.202300941
日期:2023.6.19
polyketide motif was investigated. The versatile buildingblock was made accessible by a streamlined synthesis featuring an efficient coupling procedure as well as a DFT-rationalized starting material bromination and thermodynamically controlled deracemization process. An application was demonstrated in a concise and highly-diastereoselective synthesis of (+)-di-epi-gonytolide A.
Vinylogous Addition of Siloxyfurans to Benzopyryliums: A Concise Approach to the Tetrahydroxanthone Natural Products
作者:Tian Qin、Richard P. Johnson、John A. Porco
DOI:10.1021/ja110698n
日期:2011.2.16
A concise approach to the tetrahydroxanthone natural products employing vinylogous addition of siloxyfurans to benzopyryliums and a late-stage Dieckmann cyclization has been developed. With this methodology, chiral, racemic forms of the natural products blennolides B and blennolide C have been synthesized in a maximum of four steps from a 5-hydroxychromone substrate. The regio- and diastereoselectivity of the vinylogous additions was probed using computational studies, which suggested the involvement of Diets Alder-like transition states.
TMSI-Promoted Vinylogous Michael Addition of Siloxyfuran to 2-Substituted Chromones: A General Approach for the Total Synthesis of Chromanone Lactone Natural Products
作者:Jie Liu、Zhanchao Li、Pei Tong、Zhixiang Xie、Yuan Zhang、Ying Li
DOI:10.1021/jo502571r
日期:2015.2.6
A concise and facile synthetic protocol for the construction of the 2-gamma-lactone chromanone skeleton has been achieved through a TMSI-promoted diastereoselective vinylogous Michael addition of siloxyfuran to 2-substituted chromones. The applicability of this method is demonstrated through the rapid access to the total syntheses of (+/-)-microdiplodiasone, (+/-)-lachnone C, and (+/-)-gonytolides C and G.