Aryl biocidal

In the past year, reviews on 1,8-naphthyridines, perimidines, polyazaphen-anthrenes, 3-azabicyclo[3.3.1]nonanes, and 1,2- and 2,1-benzothiazines have appeared. Reviews on specialist aspects of pyridine chemistry are devoted to the reactions of newly available pyridines, a,a -disubstituted pyridines, the reactions of pyridines with nucleophiles, the electrochemistry of IjT-disubstituted 4,4 -bipyridinium ions (the viologens such as paraquat), dihydropyridines, and 4-aryl-dihydropyridines (a new class of calcium antagonists). Reviews have been published on the cyclization of oximes and amides to quinolines and isoquinolines, quinoline- and isoquinoline-diones, benzo[fl ]- and benzo[c]-quinolizinium ions, azachrysene preparation, quinazolines with plant-growth-regulating and biocidal activities, quinazolines in pharmaceutical research, isotopic hydrogen exchange in... 

Biocidal 2-aryl-l,3-diones and their enol esters showing acaricidal and pre-and postemergence herbicidal activity were reported since the mid-1970 s as exemplified by 3-hydroxy-2-arylindones from Union Carbide [1], 3-Aryl-pyrrolidine-... 

The first 2-aryl-l,3-diones (ADs) were reported in 1977 by Wheeler (Union carbide) [58]. He claimed biocidal aryl-cyclohexenyl esters 1, 2 (Fig. 9.4) with pre-and post-emergence herbicidal effects and miticidal activity against Tetranychus urticae. 

Due to the activated C-N-doublebond of the oxathiazines, they probably have a multiside inhibition. 3-Aryl-5,6-dihydro-l,4,2-oxathiazines and their oxides are known since the early 1980s (Brouwer et al., 1984). They are published as herbicides, fungicides, plant dessicants and defoliants in agricultural and biocidal applications, but no compound was developed for these indications (Figure 4). 

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