THE SYNTHESIS OF CONDENSED RING COMPOUNDS. XIII. THE PREPARATION OF 5- AND 6-CARBALKOXY-1,4-TOLUQUINONES. ADDITION OF 5-CARBOMETHOXY-1,4-TOLUQUINONE AND 6-CARBOMETHOXY-1,4-TOLUQUINONE TO BUTADIENE1
作者:Isuru Dissanayake、Jacob D. Hart、Emma C. Becroft、Christopher J. Sumby、Christopher G. Newton
DOI:10.1021/jacs.0c06306
日期:2020.8.5
5-Bis(tert-butyldimethylsilyloxy)furans are established as vicinal bisketene equivalents for application as dienes in the Diels-Alderreaction. Cycloaddition with olefinic dienophiles, under exceptionally mild conditions, enables convergent access to highly substituted para-hydroquinones in unprotected form via a one-pot Diels-Alder/ring-opening/tautomerization sequence. The synthesis of para-benzoquinones from
Annulations of 5-Phenylthiobutenolides and First Synthesis of (±)-Indanostatin
作者:Shuai Wang、George Kraus
DOI:10.1055/s-0037-1611462
日期:2019.2
The firstsynthesis of indanostatin was achieved in 6 steps. Key steps included a butenolide annulation, oxidation to an indanetrione, and reaction with acetone.