in case of the voltage gated sodium channel blockers Safinamide and Ralfinamide. To prepare further derivatives a series of (iodobenzyl)oxybenzaldehydes (3a-3i) useful intermediates for the synthesis of biologically active compounds were synthesized in high yields by O-benzylation of 2-, 3- and 4- hydroxybenzaldehydes (2a-2c) with a variety of iodobenzylbromides (1a-1c). The title compounds were obtained
starting materials for the synthesis of biologically active compounds. Methods: Biaryl-methoxybenzaldehydes and pyridyl-aryl-methoxybenzaldehydes were synthesized by the Suzuki-Miyaura cross-coupling reactions as intermediates of potential drug substances. Three different catalytic approaches were compared. The classical Suzuki method utilising tetrakis(triphenylphosphine)palladium and sodium ethoxide, the
One-Pot Sequential N-Heterocyclic Carbene/Rhodium(III) Catalysis: Synthesis of Fused Polycyclic Isocoumarins
作者:So Won Youn、Huen Ji Yoo
DOI:10.1002/adsc.201700072
日期:2017.7.3
A one‐pot sequential N‐heterocyclic carbene–rhodium (NHC‐Rh) catalysis is described, demonstrating the compatibility of NHC and Rh catalysts. N‐Heterocyclic carbene‐catalyzedaerobicoxidation of benzaldehydes and subsequent rhodium(III)‐catalyzedoxidative coupling/annulation with multiple bonds enabled the formation of two C–O bonds and one C–C bond in a single pot. This operationally easy, one‐pot