The intramolecular Baylis–Hillman reaction: easy preparation of versatile substrates, facile reactions, and synthetic applications
作者:Jung Eun Yeo、Xiuling Yang、Hee Jin Kim、Sangho Koo
DOI:10.1039/b311951c
日期:——
We have developed a general and highly efficient method for the preparation of diverse [small omega]-formyl-[small alpha],[small beta]-unsaturated carbonyl compounds and optimized the conditions for the intramolecular Baylis-Hillman reactions of these compounds to provide various biologically important polycyclic compounds.
Ring-Expansion Protocol: Preparation of Synthetically Versatile Dihydrotropones
作者:Young-Sun Do、Ruiying Sun、Hee Jin Kim、Jung Eun Yeo、Sung-Hee Bae、Sangho Koo
DOI:10.1021/jo802064c
日期:2009.1.16
furnished versatile dihydrotropones 6. Maintaining Z-configuration in the oxidative ring-opening products 3 is crucial for the success of the ring-expansion strategy. Dihydrotropones 6 are ripe for further elaborations such as oxidation to tropones 8 and Diels−Alder reaction with the Danishefsky′s diene 10 to afford polycyclic compounds 12.
Influence of Michael Acceptor Stereochemistry on Intramolecular Morita−Baylis−Hillman Reactions
作者:Wen-Dong Teng、Rui Huang、Cathy Kar-Wing Kwong、Min Shi、Patrick H. Toy
DOI:10.1021/jo051802l
日期:2006.1.1
A study of the effect of Michael acceptor stereochemistry on the efficiency of intramolecular Morita−Baylis−Hillman (MBH) reactions has been performed. The reactions were catalyzed by a phosphine, and the reaction substrates studied were enones containing a pendant aldehyde moiety attached at the β-position of the alkene group. In all cases examined with PPh3 as the catalyst, cyclization substrates