Microwave-Based Reaction Screening: Tandem Retro-Diels–Alder/Diels–Alder Cycloadditions ofo-Quinol Dimers
摘要:
We have accomplished a parallel screen of cycloaddition partners for o-quinols utilizing a plate-based microwave system. Microwave irradiation improves the efficiency of retro-Diels-Alder/Diels-Alder cascades of o-quinol dimers which generally proceed in a diastereoselective fashion. Computational studies indicate that asynchronous transition states are favored in Diels-Alder cycloadditions of o-quinols. Subsequent biological evaluation of a collection of cycloadducts has identified an inhibitor of activator protein-1 (AP-1), an oncogenic transcription factor.
Enantioselective Synthesis of (+)‐Chamaecypanone C: A Novel Microtubule Inhibitor
作者:Suwei Dong、Ernest Hamel、Ruoli Bai、David G. Covell、John A. Beutler、John A. Porco
DOI:10.1002/anie.200805486
日期:2009.2.9
A bicycle built for tubulin: The total synthesis of (+)‐chamaecypanoneC has been achieved by using a tandem retro‐Diels–Alder/Diels–Alder cascade reaction (see scheme). Initial biological studies demonstrate that (+)‐chamaecypanoneC is an inhibitor of tubulin assembly and binds at the colchicine site.
为微管蛋白制造的自行车:通过使用串联逆 Diels-Alder/Diels-Alder 级联反应实现了 (+)-chamaecypanone C 的全合成(参见方案)。最初的生物学研究表明,(+)-chamaecypanone C 是微管蛋白组装的抑制剂,并在秋水仙碱位点结合。