A novel and green route has been developed for the electrochemical synthesis of spiro[4.5]trienones through radical-initiated dearomative spirocyclization of alkynes with diselenides. This metal-free and oxidant-free electrosynthesis reaction was performed in an undivided cell under mild conditions. A variety of selenation spiro[4.5]trienones products were prepared in moderate-to-good yields, showing
New synthesis of spirocycles by utilizing in situ forming hypervalent iodine species
作者:Toshifumi Dohi、Tomofumi Nakae、Yohei Ishikado、Daishi Kato、Yasuyuki Kita
DOI:10.1039/c1ob06199b
日期:——
A very effective spirocyclization procedure for installing nucleophiles (Nu = N3, NO2, SCN, SO2Tol, and halogens) viaiodonium(III) salts has been developed using the combination of iodoarene and mCPBA. The high-yielding syntheses of the cyclohexadienone-type spirocyclic compounds 2 having varied functionalities in the skeletons have been achieved from the aryl alkynes 1 with the optimized bis(iodoarene) 3h.