194796-93-5Relevant academic research and scientific papers
A Lewis acid-catalyzed formal [3 + 3] cycloaddition of α,β- unsaturated aldehydes with 4-hydroxy-2-pyrone, diketones, and vinylogous esters
Kurdyumov, Aleksey V.,Lin, Nan,Hsung, Richard P.,Gullickson, Glen C.,Cole, Kevin P.,Sydorenko, Nadiya,Swidorski, Jacob J.
, p. 191 - 193 (2006)
A Lewis acid-catalyzed formal cycloaddition of α,β-unsaturated aldehydes with 6-methyl-4-hydroxy-2-pyrone, 1,3-diketones, and vinylogous silyl esters is described here.
Metal-free Bronsted acid catalyzed formal [3 + 3] annulation. Straightforward synthesis of dihydro-2H-chromenones, pyranones, and tetrahydroquinolinones
Moreau, Julie,Hubert, Claudie,Batany, Jessika,Toupet, Loic,Roisnel, Thierry,Hurvois, Jean-Pierre,Renaudz, Jean-Luc
supporting information; experimental part, p. 8963 - 8973 (2010/03/04)
(Chemical Equation Presented) Bronsted acids catalyze the addition of enolizable β-diketones, β-ketoesters, and vinylogous amides to α,β-unsaturated aldehydes to lead to substituted chromenones, pyranones, and tetrahydroquinolinones in good yields under mild reaction conditions via a formal [3 + 3] cycloaddition.
Bronsted acid-catalyzed synthesis of pyrans via a formal [3+3] cycloaddition
Hubert, Claudie,Moreau, Julie,Batany, Jessika,Duboc, Agathe,Hurvois, Jean-Pierre,Renaud, Jean-Luc
supporting information; body text, p. 40 - 42 (2009/04/07)
Bronsted acids catalyze the addition of enolizable ss-keto esters to α,ss-unsaturated aldehydes leading to substituted 2H-pyrans in good yields under mild conditions via a formal [3+3] cycloaddition.
A formal [3 + 3] cycloaddition reaction. Improved reactivity using α,β-unsaturated iminium salts and evidence for reversibility of 6π-electron electrocyclic ring closure of 1-oxatrienes
Shen, Hong C.,Wang, Jiashi,Cole, Kevin P.,McLaughlin, Michael J.,Morgan, Christopher D.,Douglas, Christopher J.,Hsung, Richard P.,Coverdale, Heather A.,Gerasyuto, Aleksey I.,Hahn, Juliet M.,Liu, Jia,Sklenicka, Heather M.,Wei, Lin-Li,Zehnder, Luke R.,Zificsak, Craig A.
, p. 1729 - 1735 (2007/10/03)
A detailed account regarding a formal [3 + 3] cycloaddition method using 4-hydroxy-2-pyrones and 1,3-diketones is described here. This formal cycloaddition reaction or annulation reaction is synthetically useful for constructing 2H-pyranyl heterocycles. T
A One-Pot Condensation of Pyrones and Enals. Synthesis of 1H,7H-5a,6,8,9-Tetrahydro-1-oxopyrano[4,3-6][1]benzopyrans
Hua, Duy H.,Chen, Yi,Sin, Hong-Sig,Maroto, Maria J.,Robinson, Paul D.,Newell, Steven W.,Perchellet, Elisabeth M.,Ladesich, James B.,Freeman, Jonathan A.,Perchellet, Jean-Pierre,Chiang, Peter K.
, p. 6888 - 6896 (2007/10/03)
Condensation of various 6-substituted 4-hydroxypyrones 1 with 1-cyclohexenecarboxaldehydes in the presence of L-proline in ethyl acetate gave high yields of substituted 1H,7H-5a,6,8,9-tetrahydro-1-oxopyrano[4,3-6][1]benzopyrans. The reaction presumably oc
