Recent developments on selective homogeneous catalytic transfer hydrogenation of C--C using methanol and ethanol

This review explores the recent developments in catalytic transfer hydrogenation, focusing on the selective reduction of alpha,beta-unsaturated ketones to saturated ketones, and alkenes to alkanes using methanol and ethanol as sustainable hydrogen sources. Highlighting a range of homogeneous catalysts, including both transition and earth-abundant metals, we provide a comprehensive overview of their role in enhancing reaction efficiency, chemoselectivity, and understanding the mechanism of the catalytic cycle. Specific examples of catalytic systems are discussed, showing their broad substrate tolerance and functional group compatibility. We highlight their growing importance in green chemistry by highlighting the potential of methanol and ethanol as renewable and versatile reagents. It presents insights into future directions for catalyst design and practical applications in industrial processes.