with three bioassays, Arabidopsis and lettuce seed germination and rice seedling elongation. Some of them, i.e., 2′,3′-iso-pyridoabscisic acid (iso-PyABA) and 2′,3′-iso-franoabscisic acid (iso-FrABA), displayed good bioactivities that closed to iso-PhABA and natural (+)-ABA. Some others, for instance, substituted-iso-PhABA, exhibited certain selectivity to different physiological process when compared
Efforts toward the total synthesis of (±)-toxicodenane A utilizing an oxidopyrylium-based [5+2] cycloaddition of a silicon-tethered BOC-pyranone
作者:Jacob P. Grabowski、Gregory M. Ferrence、T. Andrew Mitchell
DOI:10.1016/j.tetlet.2020.152324
日期:2020.9
Synthetic efforts toward the tricyclic core of (±)-toxicodenane A are reported. This strategy takes advantage of the Feist-Benary furan annulation, Achmatowicz oxidative rearrangement, and oxidopyrylium-based [5+2] cycloaddition to access a key tetracyclic intermediate. This work provides a foundation that can be utilized toward the totalsynthesis of the natural product.
The first total synthesis of Furoscrobiculin B is accomplished by construction of the azuleno[6,7-c]furan ring system by base catalysed pinacol-type rearrangement of isonaphthofuran derivative, prepared from suitably functionalized hydrobenzofuran by use of the Furan Ring Transfer (FRT) reaction.
Dipolar cycloaddition of rhodium carbenoids with vinyl esters. Total synthesis of pongamol and lanceolatin B
作者:Michael C. Pirrung、Yong Rok Lee
DOI:10.1016/s0040-4039(00)73399-5
日期:1994.8
A new method for dipolarcycloaddition of diazocyclohexane-1,3-diones, leading to benzofuran derivatives, has been applied to the totalsynthesis of natural products from Tephrosia and Pongamia.
Facile strategy to 3-acylfurans by silver(I)/celite-mediated cycloaddition of 1,3-dicarbonyl compounds to vinyl sulfides. First total synthesis of α-clausenan
作者:Yong Rok Lee、Nam Suk Kim、Byung So Kim
DOI:10.1016/s0040-4039(97)01235-5
日期:1997.8
An efficient synthesis of 3-acylfurans is achieved by silver(I)/Celite-mediated cycloaddition of dicarbonyl compounds with vinyl sulfides.