Electrocatalytic Access to Azetidines via Intramolecular Allylic Hydroamination: Scrutinizing Key Oxidation Steps through Electrochemical Kinetic Analysis.

Azetidines are prominent structural scaffolds in bioactive molecules, medicinal chemistry, and ligand design for transition metals. However, state-of-the-art methods cannot be applied to intramolecular hydroamination of allylic amine derivatives despite their underlying potential as one of the most prevalent synthetic precursors to azetidines. Herein, we report an electrocatalytic method for intramolecular hydroamination of allylic sulfonamides to access azetidines for the first time. The merger of cobalt catalysis and electricity enables the regioselective generation of key carbocationic intermediates, which could directly undergo intramolecular C-N bond formation. The mechanistic investigations including electrochemical kinetic analysis suggest that either the catalyst regeneration by nucleophilic cyclization or the second electrochemical oxidation to access the carbocationic intermediate is involved in the rate-determining step (RDS) of our electrochemical protocol and highlight the ability of electrochemistry in providing ideal means to mediate catalyst oxidation.

Complete genome sequence of a novel species of Brevundimonas (strain NIBR10).

The complete genome sequence of strain NIBR10 was sequenced using PacBio RS II (Pacific Biosciences) sequencing platform. The 4,006,378-bp genome has a G + C content of 66.89% and around 3,832 coding sequences. Genomic data will provide valuable research for natural taxonomy and comparative genomics of the genus Brevundimonas.

Complete Genome Sequence of Caulobacter sp. (Strain NIBR1757) Isolated from Lake Chungju in South Korea.

Here, we report the complete genome sequence of strain NIBR1757, isolated from the water of Lake Chungju in South Korea. The assembled genome consists of 4,185 coding sequences (CDSs), 6 rRNAs, and 51 tRNAs. Comparative 16S rRNA gene sequence studies and GTDB-Tk analysis show that this strain belongs to the genus Caulobacter.

Construction of the Whole Genome of Brevundimonas sp. Strain NIBR11: An Exploration of Bacteria Isolated from Algae in the Nakdong River.

We report the genome sequence of Brevundimonas sp. strain NIBR11. Strain NIBR11 was isolated from algae collected from the Nakdong River. The assembled contig contains 3,123 coding sequences (CDSs), 6 rRNA genes, 48 tRNA genes, 1,623 genes for hypothetical proteins, and 109 genes for proteins with putative functions.

The Role of Flavobacterium enshiense R6S-5-6 in the Wetland Ecosystem Revealed by Whole-Genome Analysis.

The wetland is an important ecosystem for purifying pollutants and circulating nutrients. Numerous microorganisms contribute to maintaining this function. We obtained Flavobacterium enshiense R6S-5-6 which was isolated from Ungok (Ramsar) Wetland and conducted whole-genome sequencing to investigate what contribution R6S-5-6 could make to the wetland community. The complete genome sequence of R6S-5-6 has a size of 3,251,289 bp with 37.68% of GC content. Gene annotation revealed that R6S-5-6 has several pathways to break down pollutants, including denitrification, assimilatory sulfate reduction (ASR), and polyphosphate-accumulating process. Furthermore, R6S-5-6 has genes that can have a positive effect on plants living in wetlands, such as storing essential nutrients, promoting plant growth, and protecting plants against pathogens.