ChemInform Abstract: Enantioselective Intramolecular C—H Insertion Reactions of Donor—Donor Metal Carbenoids.

Abstract

The first asymmetric insertion reactions of donor‐donor carbenoids, which have no pendant electron‐withdrawing groups, are reported.

Synthesis of Spirobicyclic Pyrazoles by Intramolecular Dipolar Cycloadditions/[1s, 5s] Sigmatropic Rearrangements

“…intermediate in the absence of a rhodium catalyst (Scheme 1). 33 It was previously known that diazo intermediates could be trapped in the presence of unsaturated alkenes and alkynes. [34][35][36][37][38] Following our standard procedure, hydrazone 2a was made by condensing hydrazine onto the corresponding ketone.…”