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S I Selivanov - One of the best experts on this subject based on the ideXlab platform.
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reaction of 1 2 trans glycosyl acetates with Phosphorus Pentachloride new efficient approach to 1 2 trans glycosyl chlorides
Tetrahedron Letters, 2002Co-Authors: Farid M Ibatullin, S I SelivanovAbstract:Abstract Reaction of Phosphorus Pentachloride with 1,2- trans -glycosyl esters is described. The reaction mechanism presumably involves formation of a tetrachlorophosphonium ion as one of the key reactive intermediates, which can be induced either by Lewis acids or by using acetonitrile as the reaction solvent. Two novel, efficient methods for the synthesis of the thermodynamically unstable glycosyl chlorides were developed based on this reaction.
Farid M Ibatullin - One of the best experts on this subject based on the ideXlab platform.
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reaction of 1 2 trans glycosyl acetates with Phosphorus Pentachloride new efficient approach to 1 2 trans glycosyl chlorides
Tetrahedron Letters, 2002Co-Authors: Farid M Ibatullin, S I SelivanovAbstract:Abstract Reaction of Phosphorus Pentachloride with 1,2- trans -glycosyl esters is described. The reaction mechanism presumably involves formation of a tetrachlorophosphonium ion as one of the key reactive intermediates, which can be induced either by Lewis acids or by using acetonitrile as the reaction solvent. Two novel, efficient methods for the synthesis of the thermodynamically unstable glycosyl chlorides were developed based on this reaction.
Yu Yu Morzherin - One of the best experts on this subject based on the ideXlab platform.
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Phosphorus Pentachloride induced transformation of 1 2 3 thiadiazol 5 yl hydrazones of acetophenone
ChemInform, 2012Co-Authors: T A Kalinina, P E Prokhorova, T V Glukhareva, Yu Yu MorzherinAbstract:The transformation of the 1,2,3-thiadiazole moiety of title compounds (I), induced by Phosphorus Pentachloride, involves 4 atoms of the side chain and leads to triazolothiadiazine-3-carbonyl chlorides (II).
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Phosphorus Pentachloride induced transformation of 1 2 3 thiadiazol 5 yl hydrazones of acetophenone
Russian Chemical Bulletin, 2011Co-Authors: T A Kalinina, P E Prokhorova, T V Glukhareva, Yu Yu MorzherinAbstract:Reactions of (4-ethoxycarbonyl-1,2,3-thiadiazol-5-yl)hydrazones of acetophenone with PCl5 led to transformation of the 1,2,3-thiadiazole moiety involving four atoms of the side chain to give 6-aryl-5H-[1,2,3]triazolo[5,1-b][1,3,4]thiadiazine-3-carbonyl chlorides. Reaction of the latter with alcohols and amines gave the corresponding esters and amides.
Vanninen, Paula Sinikka - One of the best experts on this subject based on the ideXlab platform.
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Derivatization and rapid GC-MS screening of chlorides relevant to the Chemical Weapons Convention in organic liquid samples
'Royal Society of Chemistry (RSC)', 2020Co-Authors: Kuitunen Marja-leena, Cecilia Altamirano Jorgelina, Siegenthaler Peter, Taure, Terhi Hannele, Hakkinen, Vesa Antero, Vanninen, Paula SinikkaAbstract:A simple derivatization technique was developed for the analysis of seven Schedule 3 chemicals and one Schedule 2 chemical listed in the Chemical Weapons Convention (CWC). Phosgene, Phosphorus oxychloride, Phosphorus trichloride, Phosphorus Pentachloride, thionyl chloride, sulfur monochloride and sulfur dichloride (Schedule 3) as well as arsenic trichloride (Schedule 2) were derivatized using 1-propanol in 40% pyridine solution for analysis with gas chromatography-mass spectrometry (GC-MS). Derivatization temperature and concentration of the derivatization solution were optimized for maximum derivatization recovery. The stabilities of the target analytes and their derivatives in different solvents were studied. The derivatization yield showed a linear response within the analyte concentration range of 0.1-2 mM (10-200 mu g ml(-1)) with correlation coefficients >0.99 (r(2)), except for AsCl3 which did not show a linear response after derivatization. Good reproducibility with relative standard deviations (RSDs) from 3 to 13% was achieved. The derivatization recovery was 66% for phosgene and 67-80% for the P-containing chemicals Phosphorus oxychloride, Phosphorus trichloride and Phosphorus Pentachloride. Recommendations to use the method for screening the presence of these chemicals in organic liquid samples are given. The method is used when CWC-related samples are screened at VERIFIN.Peer reviewe
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Derivatization and rapid GC-MS screening of chlorides relevant to the chemical weapons convention in organic liquid samples
'Royal Society of Chemistry (RSC)', 2020Co-Authors: Kuitunen, Marja Leena, Siegenthaler Peter, Taure, Terhi Hannele, Hakkinen, Vesa Antero, Altamirano, Jorgelina Cecilia, Vanninen, Paula SinikkaAbstract:A simple derivatization technique was developed for the analysis of seven Schedule 3 chemicals and one Schedule 2 chemical listed in the Chemical Weapons Convention (CWC). Phosgene, Phosphorus oxychloride, Phosphorus trichloride, Phosphorus Pentachloride, thionyl chloride, sulfur monochloride, sulfur dichloride (Schedule 3) as well as arsenic trichloride (Schedule 2) were derivatized using 1-propanol in 40% pyridine solution for analysis with gas chromatography-mass spectrometry (GC?MS). Derivatization temperature and concentration of the derivatization solution were optimized for maximum derivatization recovery. The stabilities of the target analytes and their derivatives in different solvents were studied. The derivatization yield showed a linear response within the analyte concentration range of 0.1?2 mM (10?200 µg/ml) with correlation coefficients > 0.99 (r2), except for AsCl3 which did not show a linear response after derivatization. Good reproducibility with relative standard deviations (RSDs) from 3 to 13% was achieved. The derivatization recovery was 66% for phosgene and 67?80% for the P-containing chemicals Phosphorus oxychloride, Phosphorus trichloride and Phosphorus Pentachloride. Recommendations to use the method for screening the presence of these chemicals in organic liquid samples are given. The method is used when CWC-related samples are screened at VERIFIN.Fil: Kuitunen, Marja Leena. University of Helsinki; FinlandiaFil: Altamirano, Jorgelina Cecilia. Universidad Nacional de Cuyo. Facultad de Ciencias Exactas y Naturales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; ArgentinaFil: Siegenthaler, Peter. Federal Office for Civil Protection; SuizaFil: Taure, Terhi Hannele. University of Helsinki; FinlandiaFil: Häkkinen, Vesa Antero. University of Helsinki; FinlandiaFil: Vanninen, Paula Sinikka. University of Helsinki; Finlandi
T A Kalinina - One of the best experts on this subject based on the ideXlab platform.
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Phosphorus Pentachloride induced transformation of 1 2 3 thiadiazol 5 yl hydrazones of acetophenone
ChemInform, 2012Co-Authors: T A Kalinina, P E Prokhorova, T V Glukhareva, Yu Yu MorzherinAbstract:The transformation of the 1,2,3-thiadiazole moiety of title compounds (I), induced by Phosphorus Pentachloride, involves 4 atoms of the side chain and leads to triazolothiadiazine-3-carbonyl chlorides (II).
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Phosphorus Pentachloride induced transformation of 1 2 3 thiadiazol 5 yl hydrazones of acetophenone
Russian Chemical Bulletin, 2011Co-Authors: T A Kalinina, P E Prokhorova, T V Glukhareva, Yu Yu MorzherinAbstract:Reactions of (4-ethoxycarbonyl-1,2,3-thiadiazol-5-yl)hydrazones of acetophenone with PCl5 led to transformation of the 1,2,3-thiadiazole moiety involving four atoms of the side chain to give 6-aryl-5H-[1,2,3]triazolo[5,1-b][1,3,4]thiadiazine-3-carbonyl chlorides. Reaction of the latter with alcohols and amines gave the corresponding esters and amides.