Kannupal Srinivasan

Copper‐Catalyzed C–H Insertion of N ‐Heterocycles Into Diazo Arylidene Succinimides

Copper(II) triflate is found to be an effective catalyst for the regioselective C–H insertion of heteroaromatic compounds into diazo arylidene succinimide‐based carbene precursors. Preferential C3–H insertion occurs in N ‐substituted and unsubstituted indoles, while selective C2–...

(3 + 2) Annulation of Indane-1,3-Dione-Based Spiro Donor–Acceptor Cyclopropanes with Thioureas: Entry to Iminodihydrothiophenes and Thienobenzazepinediones

Abstract Spiro donor–acceptor cyclopropanes (DACs) based on an indane-1,3-dione moiety underwent atypical ring cleavage during their Yb(OTf)3-catalyzed (3 + 2) annulation with thioureas. The gem-diamino tetrahydrothiophene intermediates initially formed in the annulation spontane...