Asinger

Asinger and Offermanns (607) have reviewed the chemistry of A-3 thiazolines, and Ohta and Kato s (663) comprehensive survey on syd-nones includes a section of mesionic thiazoles (cf. Chapter VIII). 

Asinger and Thiel (473) use an aldehyde and ammonia instead of nitrile. Thus the reaction of mercaptoacetone. with benzaldehyde and ammonia gives 4 methyl-2-phenylthiazole in 80% yield and 4-methyl-2-pheny]-A-4-thiazoline as the main by-product. 

During their researches on thiazolines, Asinger and Thiel (437.452, 518) showed that A-3-thiazolines (281) can be dehydrogenated to thiazoles in good yields (Scheme 150). 

Asinger et a], have developed a simple preparative method for variously substituted A3-thiazolines by the action of sulfur and ammonia on ketones. 

A more recent method (31) is to prepare the Aj-thiazoline from the mercaptoacetaldehyde dimer, ammonia, and an aldehyde using Asinger s method (32). 

B. Fell, W. Rupiliua, and G. Asinger, Tetrahedron Lett., 3261 (1968), and references cited therein. 

J. E. McMurry, J. Melton, and H. Padgett, J. Org. Chem., 39, 259 (1974). We have recently been informed that ozonoly3is of nitronate anions was first reported in a paper by F. Asinger, Ber77, 73 (1944). 

R. M. Barrer, in Zeolites and Clay Minerals as Sorbents and Molecular Sieves, Academic Press, London, 1978 F. Asinger, Die Petrolchemische Industrie, Akademie-Verlag, Berlin, 1971, pp. 73-95 K. Lindner, Seife-Ole-Fette-Wachse 94 81, 110 (1968) E. Guccione, Chem. Eng. 72(9) 104 (1965). 

F. Asinger, Die Petrolchemische Industrie, Akademie-Verlag, Berlin, 1971, pp. 11, 73-95. 

F. Asinger and B. Fell, Erdol-Kohle-Erdgas-Petrochemie 19 345 (1966). 

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