Bifunctional Polymeric Organocatalysts and Their Application in the Cooperative Catalysis of Morita–Baylis–Hillman Reactions
作者:Cathy Kar-Wing Kwong、Rui Huang、Minjuan Zhang、Min Shi、Patrick H. Toy
DOI:10.1002/chem.200601197
日期:2007.3.5
these polymeric reagents contained either alkyl alcohol or phenol groups on the polymer backbone. The use of these materials as organocatalysts in a range of Morita-Baylis-Hillman reactions indicated that hydroxyl groups could participate in the reactions and accelerate product formation. In the cases examined, phenol groups were more effective than alkyl alcohol groups for catalyzing the reactions
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.
Some unusual reactions of molecular oxygen with bicyclic diazenes which typically serve as precursors to alkylidenecyclopenane-1,3-diyls; peroxide formation
作者:R. Daniel Little、Lorraine Losiski-Dang、Manuel G. Venegas、Craig Merlic
DOI:10.1016/s0040-4039(00)85938-9
日期:1983.1
The reaction of a series of substituted bicyclic diazenes with oxygen was investigated. Three types of products result, namely ketoalcohols 2b-f, ketoaldehydes 4e-g and dioxolanes 3e-g. The potential intermediacy of an endoperoxide 5f is considered.
ortho-Acidic aromatic thiols as efficient catalysts of intramolecular Morita–Baylis–Hillman and Rauhut–Currier reactions
作者:Philipp S. Selig、Scott J. Miller
DOI:10.1016/j.tetlet.2010.11.077
日期:2011.4
ortho-Mercaptobenzoic acid and ortho-mercaptophenols were discovered as efficient thiol catalysts of both the intramolecular Morita–Baylis–Hillman (MBH) and Rauhut–Currier (RC) reaction. High reaction rates were achieved under mildly basic, aqueous conditions. The unprecedented catalytic activity of these protic nucleophiles could originate from a Brønsted acid induced destabilization of intermediate
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