Enantioselective Total Synthesis of (+)-Wortmannin
作者:Yinliang Guo、Tianfei Quan、Yandong Lu、Tuoping Luo
DOI:10.1021/jacs.7b02515
日期:2017.5.24
A concise and enantioselectivetotalsynthesis of the potent PI3K inhibitor (+)-wortmannin is described. A Pd-catalyzed cascade reaction was first developed to connect a synthon derived from Hajos-Parrish ketone to a furan moiety. The subsequent Friedel-Crafts alkylation of the β-position of a furan ring to an epoxide was optimized to establish the C10 quaternary center. (+)-Wortmannin was eventually
作者:Woo Han Kim、Angie R. Angeles、Jun Hee Lee、Samuel J. Danishefsky
DOI:10.1016/j.tetlet.2009.08.131
日期:2009.11
We describe herein a concisesynthesis of an intermediate, via 2,3-Wittig rearrangement and Williamson etherification, en route to the natural products, xenibellols A and B.
我们在此描述了一种通过 2,3-Wittig 重排和威廉姆森醚化合成中间体的简明合成方法,在生成天然产物 xenibellols A 和 B 的过程中。
Rapid Access to Tetracyclic Core of Wortmannin via an Intramolecular Reductive Olefin Coupling Strategy
A convergent approach to assemble the fused BCDE tetracyclic framework of wortmannin is presented. This route features a very challenging Suzuki–Miyaura coupling to prepare the fully functionalized furan intermediate, a Negishi-type acylation to unite the two enantio-enriched fragments, and a subsequent hydrogen-atom-transfer-initiated 6-endo radical cyclization to install the central cyclohexadienone
A Hypervalent Iodine-Induced Double Annulation Enables a Concise Synthesis of the Pentacyclic Core Structure of the Cortistatins
作者:Jessica L. Frie、Christopher S. Jeffrey、Erik J. Sorensen
DOI:10.1021/ol902168g
日期:2009.12.3
A stereocontrolled synthesis of a complex pentacycle embodying the molecular architecture of the cortistatin class of natural products was achieved from the (+)-Hajos−Parrish ketone. The cornerstone of our approach is a hypervalent iodine induced tandem intramolecular oxidative dearomatization and nitrile oxide cycloaddition. The manner in which these ring formations were orchestrated has yielded a