Substituted Cyclohexadienals - Syntheses and Applications
申请人:Watanabe Coran M. H.
公开号:US20070232813A1
公开(公告)日:2007-10-04
The present invention is generally directed to the use of L-proline and certain derivatives thereof to catalyze the asymmetric self-condensation of α,β-unsaturated aldehydes to form homodimer and heterodimer cyclohexadienals. Reaction conditions are mild and yet amenable to a variety of different substrates yielding molecules with complex scaffolds from simple precursors. This approach allows for diversification and synthesis of this structural class of compounds in sufficient quantity, purity and enantioselectivity for, e.g., biological investigations and use as fluorescent probes, anti-cancer agents, anti-bacterial agents, and/or anti-fungal agents. The present invention is also generally directed to the cyclohexadienals produced.
Biocatalysis with the milk protein β-lactoglobulin: promoting retroaldol cleavage of α,β-unsaturated aldehydes
作者:Vishruth Gowda、Brendan Foley、Jasmine Du、Megan Esteb、Coran M. H. Watanabe
DOI:10.1039/c8ob00139a
日期:——
activity. β-Lactoglobulin (BLG), the principle whey protein found in milk, possesses a central calyx that binds non-polar molecules. Here, we report that BLG can catalyze the retro-aldol cleavage of α,β-unsaturated aldehydes making it a naturally occurring protein capable of catalyzing retro-aldol reactions on hydrophobic substrates. Retroaldolase activity was seen to be most effective on substrates
The epoxyhexenyne - vinylfuran transformation: Evidence for carbene intermediates
作者:Wolfgang Eberbach、Joachim Roser
DOI:10.1016/s0040-4039(00)96181-1
日期:1987.1
thermal conversion of the (Z)-epoxyhexenynes / into three pairs of isomeric vinylfuran derivatives is explained on the basis of a multi-step mechanism with butenynyl carbonyl ylides, cycloallenes and vinyl carbenes as intermediates.