An efficient approach for stereoselective synthesis of cyclopropyl indolyl ketone from olefin and arsonium ylied was achieved. Its advantages are of mild condition, high yield, and good stereoselectivity. In addition, the one‐pot cycloproparation of olefins with bromides and triphenylarsine was studied. J. Heterocyclic Chem., (2010).
Domino reactions in water: diastereoselective synthesis of densely functionalized indolyldihydrofuran derivatives
作者:Pethaiah Gunasekaran、Kamaraj Balamurugan、Sathiyamoorthi Sivakumar、Subbu Perumal、J. Carlos Menéndez、Abdulrahman I. Almansour
DOI:10.1039/c2gc16517a
日期:——
A library of trans-5-aroyl-2-(indol-3-yl)-4-aryl-4,5-dihydrofuran-3-carbonitriles was diastereoselectively synthesized in excellent yields from the reaction of 2-(3-indolylcarbonyl)-3-aryl-2-propenenitriles with (2-aryl-2-oxoethyl)pyridinium bromides in the presence of triethylamine via a simple, user-friendly domino process carried out in water. Extraction and chromatographic steps were avoided, since the final products could be simply filtered from the aqueous reaction medium and recrystallized. This one-pot transformation generates one C–C and one C–O bond and presumably proceeds by a domino sequence involving the generation of a pyridinium ylide, a Michael addition and a final annulation via intramolecular nucleophilic substitution.