- Efficient and convenient one-pot synthesis of phosphoramidates and phosphates
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A simple and efficient one-pot method is described for the synthesis of phosphoramidates/phosphates in excellent yields from dialkylphosphites and trichloroisocyanuric acid in acetonitrile and subsequent treatment with dialkyl amines/alcohols. The procedure is operationally simple, has reduced reaction times, and uses a one-pot procedure. Copyright Taylor & Francis Group, LLC.
- Gupta,Acharya,Dubey,Kaushik
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p. 3403 - 3407
(2008/02/13)
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- Phosphorylation of alcohols with N-phosphoryl oxazolidinones employing copper(II) triflate catalysis
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(Chemical Equation Presented) Phosphoryl transfer from N-phosphoryl 5,5-diphenyl oxazolidinone is efficiently catalyzed by copper(II) triflate. The utility of this method has been demonstrated in the phosphorylation of representative primary, secondary, tertiary, phenolic, and allylic alcohols. These reaction conditions are significantly milder than employing alkoxides and allow the phosphorylation of biologically relevant molecules.
- Jones, Simon,Smanmoo, Chaiwat
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p. 3271 - 3274
(2007/10/03)
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- N-Phosphoryl oxazolidinones as effective phosphorylating agents
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A number of N-phosphoryl oxazolidinones have been prepared and evaluated, the best being 5,5-diphenyl oxazolidinones, the utility of which was demonstrated in the phosphorylation of a number of representative primary, secondary, tertiary, and phenolic alcohols.
- Jones, Simon,Smanmoo, Chaiwat
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p. 1585 - 1588
(2007/10/03)
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- Palladium-catalyzed allylic coupling of 1,2,3-triazolo[4,5-d]pyrimidines (8-azapurines)
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The palladium-catalyzed coupling of the sodium salt of 7-amino-1,2,3-triazolo[4,5-d]pyrimidine (8-azaadenine, 1) with allylic phosphates or carbonates resulted in mixtures of 2- and 3-substituted 1,2,3-triazolopyrimidines, which were separated by chromatography. 1-Substituted triazolopyrimidines were not isolated from these reactions. Regioselectivity (and stereoselectivity) was also observed for substitution of the allylic moiety when more than one isomer is possible from the reaction. The use of 5-amino-1,2,3-triazolo[4,5-d]pyrimidin-7-ones (8-azaguanine, 2), instead of 8-azaadenine, also resulted in mixtures. Alternate syntheses of the 3-allyl-1,2,3-triazolo[4,5-d]-pyrimidines confirmed the structures of these compounds.
- Konkel, Michael J.,Vince, Robert
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p. 6199 - 6204
(2007/10/03)
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- Lower alkyl di propargyl phosphates
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Synergistic arthropodicidal compositions containing (1) a phosphorus-containing compound of the formula STR1 in which R1, R2 and R3 each independently is an optionally substituted alkyl, alkenyl or aryl radical, at least one of R1, R2 and R3 being an optionally substituted alkenyl radical unsaturated in the 2-position, X is oxygen or sulphur, and Y and Z each independently is oxygen, sulphur or a direct bond; and if both Y and Z are oxygen or sulphur or a direct bond, then any of R1, R2 and R3 can denote propargyl in addition to the radicals indicated above, and (2) at least one (A) carbamate, (B) carboxylic acid ester, (C) phosphoric acid ester other than (1), (D) halogenocycloalkane or (E) halogenoalkane.
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