Hydrophobic species-enabled acid–base multi-catalysis for stereoselective access to renewable trans-anethole

Abstract

Trans-anethole (trans-AN) is widely applied in food, daily necessities, and pharmaceuticals, which is typically available from inefficient natural oil extraction or complex organic transformations over mineral acid or noble metals....

Rhodium-Catalyzed Oxidative Alkenylation of Anisole: Control of Regioselectivity

“…Recently, the conversion of 4-MOPP to cis - and trans -anethole via a cascade Meerwein–Ponndorf–Verley (MPV) reduction/dehydration process was reported using Zr-containing zeolites achieving 94% conversion of 4-MOPP in 4 h with 80% selectivity for trans -anethole . Additionally, bifunctional organophosphate-hafnium frameworks have been shown to convert 4-MOPP to trans -anethole with quantitative conversion of 4-MOPP and 90% selectivity for trans -anethole through an MPV reduction/dehydration process. − …”

“… 10 Additionally, bifunctional organophosphate-hafnium frameworks have been shown to convert 4-MOPP to trans -anethole with quantitative conversion of 4-MOPP and 90% selectivity for trans -anethole through an MPV reduction/dehydration process. 11 − 14 …”