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High-yield production of a functionally active mimic of particulate methane monooxygenase in Escherichia coli has been presented. Investigation of its catalytic mode clarifies the role of duroquinol in biomimetic methanol production.
The diversity of engineered amine dehydrogenases for reductive amination remains limited. Now, native amino dehydrogenases offering a different sequence space and catalytic features are discovered — enhancing and broadening the biocatalysis toolbox.
The asymmetric synthesis of chiral γ-lactams is difficult and laborious; typically requiring pre-functionalization of starting materials. Now, a highly efficient alternative approach employing direct C−H amidation via chiral hydrogen-bond-donor catalysts has been developed.
The selective electrochemical conversion of ketones to value-added products still represents a challenge, due to a lack of fundamental understanding. Now, a principle has been revealed that allows the steering of the electroreduction of aliphatic ketones on platinum by carefully controlling the coordination number of the platinum atoms.
The synthesis of highly branched low molecular weight products — potential synthetic lubricants — directly from ethylene is challenging when highly efficient early transition metal catalysts are employed. Now, an alkane soluble co-catalyst permits the synthesis of such polyethylenes using a zirconium catalyst in a saturated hydrocarbon solvent, where competitive solvent coordination at the active site of the catalyst is relatively unimportant.
Optimization of catalytic stereoselectivity for new substrates often requires a time consuming experimental process, and high-accuracy molecular modelling remains intractable for comprehensive virtual screening. Now, highly enantioselective rhodium hydrogenation catalysts have been identified using a rapid computational transition-state analysis protocol and then experimentally verified.