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New perspectives to control Colorado potato beetle (Leptinotarsa decemlineata Say) – a short review devoted to the recent identification of the aggregation pheromone of Colorado potato beetle

100%

Polec I.

nr 1-4

The short review of investigations done in the field of identification, application and synthesis of the aggregation pheromone of Colorado potato beetle, (S)-3,7-dimethyl-2-oxooct-6-en-1,3-diol, is presented.

Contemporary trends in development of active substances possessing the pesticidal properties: ryanodine-receptor targeting insecticides

51%

Legocki J. , Polec I. , Zelechowski K.

nr 3-4

15-26

The latest developed classes of synthetic insecticides – phthalic acid diamides and antranilic diamides, acting as ryanodine receptor modulators, are discussed. The mode of their activity, the insecticidal properties and characteristics of their representatives is reviewed.

Ethyl [1S, 2RS]-and [1S,2S]-2-[2-chloro-propanoyloxy]propanoate. Preparation and hydrolysis

45%

Polec I. , Komorowska-Kulik J. , Kielczewska A. , Bombinska D. , Legocki J.

nr 3-4

27-52

Ethyl (1S,2RS)-2-(2-chloropropanoyloxy)propanoate ((1S,2RS)-(I)) was obtained from rac-2-chloropropionyl chloride and ethyl L-lactate. (1S,2S)- (I) was also synthesized from (S)-2-chloropropionyl chloride and ethyl L-lactate with 93% d.e. (I) was undertaken hydrolysis by different media: NaOH/THF-H2O, Na2CO3/THF-H2O, LiOHxH2O/THF-H2O, 25% NaOH/H2O, and weakly acidic ion-exchange resin Amberlite IRC748 dispersion in MeOH. (1S,2RS)-2-(2-Chloropropanoyloxy) propanoic acid (II) diastereomers were identified as products of acidic hydrolysis with the ionic resin. GC/MS, HPLC and HPLC/MS analyses of resulted products are presented.

Ethyl N,N-dimethyl- and N,N-dimethylamidophosphoric acids sodium salts. Preparation and hydrolysis

45%

Polec I. , Huras B. , Sas A. , Kielczewska A. , Legocki J.

nr 3-4

53-61

Sodium salts of ethyl N,N-dimethyl- and N,N-dimethylamidophosphoric acids I and II were obtained and their hydrolysis to respective acids was investigated. The salts and acids were characterized by spectral methods (MS, FT/IR, 1H, 13C, 31P NMR).