89809-67-6Relevant articles and documents
Facile construction of 4H-chromenes via Michael addition of phenols to benzylidene oxobutanoates and their successful conversion into pyranocoumarins
Priyanka,Sharma, Rajesh K.,Butcher, Ray J.,Katiyar, Diksha
supporting information, p. 2347 - 2351 (2018/05/24)
An efficient and simple approach for the synthesis of functionalized 4H-chromenes has been developed via acid catalyzed Michael addition of phenols to benzylidene oxobutanoates. Preliminary mechanistic studies were conducted, suggesting that intermediate
A simple method for the preparation of functionalized trisubstituted alkenes and α,β,γ,δ-unsaturated carbonyl compounds by using natural amino acid l-tryptophan
Hu, Ying,He, Yan-Hong,Guan, Zhi
scheme or table, p. 656 - 659 (2010/11/05)
Primary natural amino acid l-tryptophan was used, for the first time, as a catalyst in Knoevenagel condensations of aliphatic, aromatic, hetero-aromatic and α,β-unsaturated aldehydes with less reactive acetylacetone and ethyl acetoacetate. The reactions were carried out at room temperature and gave good yields. It is a convenient entry for preparation of functionalized trisubstituted alkenes and α,β,γ,δ-unsaturated carbonyl compounds.
Magnesium perchlorate as efficient Lewis acid for the Knoevenagel condensation between β-diketones and aldehydes
Bartoli, Giuseppe,Bosco, Marcella,Carlone, Armando,Dalpozzo, Renato,Galzerano, Patrizia,Melchiorre, Paolo,Sambri, Letizia
, p. 2555 - 2557 (2008/09/21)
A new protocol for the Knoevenagel condensation between β-diketones and aliphatic and aromatic aldehydes promoted by Mg(ClO4)2 under mild conditions is reported.
