[Prevalence of Foodborne Pathogens in Retail Meat in Saitama, Japan].

We investigated the prevalence of Campylobacter jejuni, Campylobacter coli, Salmonella, enterohemorrhagic Escherichia coli, enterotoxigenic Escherichia coli, Yersinia enterocolitica, and Escherichia albertii in domestic chicken and pork sold at retail stores in Saitama Prefecture, Japan. Campylobacter was detected in 35.7% (60/168) of chicken samples and 7.

An outbreak of food poisoning due to serotype O7:H4 carrying for enteroaggregative heat-stable enterotoxin1 (EAST1).

In June 2020, a large-scale food poisoning outbreak involving about 3000 elementary and junior high school students occurred in Yashio, Saitama, Japan. A school lunch was the only food stuff ingested by all of the patients. Escherichia coli serotype O7:H4 carrying the astA gene for enteroaggregative E.

Organosilicon Reducing Reagents for Stereoselective Formations of Silyl Enol Ethers from α-Halo Carbonyl Compounds.

Salt-free stereoselective synthesis of silyl enol ethers was achieved by treating α-halo carbonyl compounds with 2,3,5,6-tetramethyl-1,4-bis(trimethylsilyl)-1,4-dihydropyrazine. In this reaction, easily removable trimethylsilyl halides and 2,3,5,6-tetramethylpyrazine were generated as the reaction byproducts. Due to the inertness of the reaction byproducts, we found a one-pot transformation of the in situ generated silyl enol ethers into various α-functionalized carbonyls by reaction with Togni-II reagent or aldehydes.

Mixed Ligated Tris(amidinate)dimolybdenum Complexes as Catalysts for Radical Addition of CCl to 1-Hexene: Leaving Ligand Lability Controls Catalyst Activity.

We synthesized a series of mixed ligated tris(amidinate)dimolybdenum complexes, namely, [Mo(DAniF)(L)] [DAniF = N,N'-di(p-anisyl)formamidinate; L = acetate (OAc; 1a), m-diphenylphosphino benzoate (m-PPhBz; 1b), nicotinate (Nico; 1c), benzoate (Bz; 1d), 3-furoate (3-Furo; 1e), isonicotinate (IsoNico; 1f), and trifluoromethanesulfonate (OTf; 1g)], which served as catalysts for radical addition of CCl to 1-hexene to give 1,1,1,3-tetrachloroheptane. These mixed ligated complexes 1a-g afforded the higher yield of the radical addition product than a homoleptic DAniF complex, [Mo(DAniF)] (2). Among them, complexes 1a and 1g gave the radical addition product quantitatively after 9 h with a short induction period.

Mixed-ligand complexes of paddlewheel dinuclear molybdenum as hydrodehalogenation catalysts for polyhaloalkanes.

We developed a hydrodehalogenation reaction of polyhaloalkanes catalyzed by paddlewheel dimolybdenum complexes in combination with 1-methyl-3,6-bis(trimethylsilyl)-1,4-cyclohexadiene (MBTCD) as a non-toxic H-atom source as well as a salt-free reductant. A mixed-ligated dimolybdenum complex Mo(OAc)[CH(NAr)] (, Ar = 4-MeOCH) having two acetates and two amidinates exhibited high catalytic activity in the presence of BuNCl, in which [ BuN][Mo{CH(NAr)}Cl] (), derived by treating with ClSiMe and BuNCl, was generated as a catalytically-active species in the hydrodehalogenation. All reaction processes, oxidation and reduction of the dimolybdenum complex, were clarified by control experiments, and the oxidized product, [ BuN][Mo{CH(NAr)}Cl] (), was characterized by EPR and X-ray diffraction studies.