Preparation of oxygenated heterocycles via the cyclization reaction of α-diazo substituted alkynes

Article abstract of DOI:10.1016/S0040-4039(00)97184-3

treatment of a series of α-diazo alkynyl substituted ketones with rhodium (II) carboxylates results in the formation of vinyl rhodium carbenoids. These species undergo further cyclization onto a neighboring carbonyl group to produce furans.