“…Photochemical reactions of indoles and other substrates with aryl diazo acetates have been well reported by us and many others. , For example, diverse strategies for C–H functionalization and cyclopropanation of N-free or protected indoles have been demonstrated both under inter- and intramolecular fashion. , Additionally blue LED mediated ring expansion, cross coupling, carbene transfer, and NH-insertion have been reported with aryl diazoacetate in various substrates such as tetrahydrofuran, propargyl alcohol, indoles, carbazoles, pyrazoles, imidazoles, and etc. ,,,, . Recently, photochemical Doyle-Kirmse reactions have also been reported with aryl diazoacetates in blue LED. , We envisaged that our telescoping procedure will consist of cyclopropanation of indole derivatives followed by the in situ lactam formation of the resulting cyclopropane intermediate 4a and finally selective cyclopropane ring opening of 5a to afford the desired products (Table , Scheme a).…”