Synthesis of substituted hexa-3,5-dienoic acid methyl esters from conjugated dienones
作者:Rishan Lang Nongkhlaw、Ridaphun Nongrum、Bekington Myrboh
DOI:10.1039/b101242h
日期:——
Substituted hexa-3,5-dienoic acid methyl esters (2) were conveniently prepared in one step by 1,2-carbonyl transposition of the corresponding dienones (1) using lead(IV) acetate and boron trifluoride–diethyl ether in benzene at room temperature.
Multicomponent and Metal‐Free Diels–Alder/Aromatization Approach to the Stereospecific Synthesis of <i>E</i>‐(Hetero)Stilbenes and Diarylacetylenes
作者:Marco Ballarotto、Bruno Cerra、Andrea Temperini
DOI:10.1002/ejoc.202300552
日期:2023.9.21
A straightforward, stereospecific and regioselective strategy for the synthesis of substituted E-stilbenes and diarylacetylenes without the use of metal catalysts was developed. DFT calculations were also performed confirming a concerted [4+2] reaction mechanism of the key ring-forming step.