Multienzymatic Synthesis of γ‐Lactam Building Blocks from Unsaturated Esters and Hydroxylamine
作者:Christina Jäger、Martin Nieger、Kari Rissanen、Jan Deska
DOI:10.1002/ejoc.202300288
日期:2023.10.16
hydroxylamidation with an oxidase/peroxidase-induced ene-type cyclization. This methodology provides a mild and scalable access to N-heterocyclic buildingblocks from basic γ,δ-unsaturated esters and aqueous hydroxylamine, and its utility is illustrated by the formal total synthesis of the tetracyclic alkaloid cephalotaxine.
Aerobic C−N Bond Formation through Enzymatic Nitroso‐Ene‐Type Reactions**
作者:Christina Jäger、Mona Haase、Katja Koschorreck、Vlada B. Urlacher、Jan Deska
DOI:10.1002/anie.202213671
日期:2023.2.6
laccases participate in C−N bond-forming reactions through the generation of reactive nitroso intermediates from acylated hydroxylamines. The formal allylic C−H bond activation proceeds with air as the terminal oxidant and provides high yields both in intramolecular and intermolecular aminationreactions through this unprecedented biocatalytic nitroso-ene-type reaction pathway.