Abstract
AbstractAlthough 2‐furyl‐carbenes (furfurylidenes) are prone to instantaneous electrocyclic ring opening, chiral [BiRh]‐paddlewheel complexes empowered by London dispersion allow (trifluoromethyl)furfurylidene metal complexes to be generated from a bench‐stable triftosylhydrazone precursor. These reactive intermediates engage in asymmetric [2+1] cycloadditions and hence open entry into valuable trifluoromethylated cyclopropane or ‐cyclopropene derivatives in optically active form, which are important building blocks for medicinal chemistry but difficult to make otherwise.
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