Nonstabilized azomethine ylides in the synthesis of aryl cucurbitine derivatives
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DOI: 10.1016/j.tetlet.2019.01.047
Abstract: Abstract Nonstabilized azomethine ylides react with 4-arylidene-2-phenyloxazol-5(4H)-ones to form diazaspiro[4.4]nonenes, which were hydrolyzed to aryl cucurbitine derivatives in 35–67% overall yield. read more here.
Keywords: ylides synthesis; aryl cucurbitine; azomethine ylides; nonstabilized azomethine ... See more keywords
A Formal (4 + 2) Cycloaddition of Phosphorus Ylides: Synthesis of Aromatic and Heteroaromatic 1,2-Diesters and Diones.
Sign Up to like & getrecommendations! Published in 2022 at "Organic letters"
DOI: 10.1021/acs.orglett.2c01234
Abstract: Heteroarylmethylenephosphorus ylides underwent Michael addition with alkynediones and alkynediesters, followed by intramolecular cyclization and elimination of triphenylphosphine oxide to afford 1,2-diaroylbenzenes and 1,2-alkoxycarbonylcarbo- and heterocycles. The analogous (4 + 2) cycloaddition led to the formation… read more here.
Keywords: phosphorus ylides; ylides synthesis; cycloaddition phosphorus; formal cycloaddition ... See more keywords
Fragmentation of Glucosylphosphonium-ylides for Synthesis of Glycals
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DOI: 10.1039/d5qo00283d
Abstract: Metal-free carbenes are high-energy reactive intermediates that have been harnessed for numerous useful transformations. However, access to these versatile intermediates is often limited by the requirement for highly energetic diazoalkane... read more here.
Keywords: chemistry; fragmentation glucosylphosphonium; ylides synthesis; synthesis glycals ... See more keywords