Azetidines are of {particular|specific|certain|distinct|unique} interest in medicinal chemistry for their favorable properties, {including|such as|which includes|like} {increased|elevated|improved|enhanced} resistance to oxidative metabolism and {lower|reduce|reduced|decrease} lipophilicity. The {recent|current} {development|improvement} of [2+2] reactions has {significantly|considerably|substantially|drastically} benefitted the previously {limited|restricted} {methods|techniques|strategies|approaches|procedures|solutions} for azetidine synthesis, but access to {more|much more|a lot more|far more|additional|extra} {complex|complicated} architectures {still|nonetheless|nevertheless} {requires|demands|needs|calls for} {further|additional} {development|improvement}. Herein we report a visible-light enabled intramolecular [2+2] cycloaddition to access tricyclic azetidines with 3D {complex|complicated} structures and {high|higher} levels of saturation. Fmoc-L-Val-OH Price 1255352-25-0 Chemical name PMID:30125989

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