Palladium-Catalyzed Narasaka-Heck Carbonylation Using Cr(CO)6 as Carbonyl Source: Access to Ester-Containing Pyrrolines.
An unprecedented Pd-catalyzed CO gas-free Narasaka-Heck carbonylation using Cr(CO)6 as a convenient carbonyl source has been developed for the step-economic construction of ester-containing pyrrolines. Notably, this method overcomes the limitations of conventional radical pathways, enabling compatibility with phenol-ty...