In connection with other projects, we some time ago initiated studies on the insertion of α-keto carbenoids into the C-3H of pyrroles, no examples of which were then known, as well as into the C-2H of indoles. A recent publication of Capretta and Salim, 4 which describes examples of both processes, causes us to disclose our results in this area. ... The α-diazo-β-ketoesters 6 and 7 were unaffected by catalytic rhodium(II) acetate in dichloromethane, even at ...