Gold-Catalyzed [1,5]-Hydride Shift onto Unactivated Alkynes To Trigger an Intermolecular Diels–Alder Reaction
摘要:
A [1,5]-hydride shift of sp(3) C-H onto an unactivated carbon carbon triple bond catalyzed by a gold(I) complex enabled N-propargylisoindolines to be latent dienes and therefore triggered an intermolecular Diels-Alder reaction with dienophiles. This protocol provides an atom-economical and straightforward approach to access a wide range of polycyclic skeletons in high yields and with excellent diastereoselectivities from easily accessible molecules.
Enantiotopos-Selective CH Oxygenation Catalyzed by a Supramolecular Ruthenium Complex
作者:James R. Frost、Stefan M. Huber、Stefan Breitenlechner、Christoph Bannwarth、Thorsten Bach
DOI:10.1002/anie.201409224
日期:2014.11.20
97:3) upon catalysis by a chiral ruthenium porphyrin complex (1 mol %). The catalyst exhibits a lactam ring, which is responsible for substrate association through hydrogen bonds, and an active ruthenium center, which is in a defined spatial relationship to the oxygenation substrate. DFT calculations illustrate the perfect alignment of the active site with the reactive CH bond and suggest—in line with