[PDF] acetic anhydride in dmf

In this paper we describe such an easy and highly efficient synthesis of merocyanine dyes based on a multiple-component reac- tion involving a formylating  Autres questions
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  • What is the purpose of adding acetic anhydride?

    Acetic Anhydride is a colorless liquid with a characteristic sharp odor. It is used in making plastics, drugs, dyes, perfumes, explosives and aspirin.

  • What does acetic anhydride do as a reagent?

    Acetic anhydride can be used as a dehydrating agent for the formation of anhydrides (Scheme 2). This may be achieved in the absence of catalysts or with acidic or basic catalysts <09CB3484, 25CB1418, 57JA3508, 85LA1935>. Cyclic anhydrides are formed more rapidly than acyclic anhydrides <66JIC615>.

  • How do you remove acetic anhydride from a reaction mixture?

    Acetic anhydride is recovered from a mixture of acetic anhydride, acetic acid and water by contacting the mixture with at least one extraction solvent selected from the group consisting of a hydrophobic, organic solvent, a ketone and an ester to extract and recover acetic anhydride.
  • It is used in the synthesis of Heroin by diacetylation of Morphine and thus also banned in many countries.
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DMF in Acetic Anhydride: A Useful Reagent for Multiple-Component

from DMF in acetic anhydride. Scheme 1 shows the retrosynthetic analysis of the dye synthesis based on the easily accessible hydroxypyri-.



A comparative study of terminating agents for use in solid-phase

acetic anhydride and triethylamine in DMF - in the solid-phase synthesis of H-Leu-Ala-Gly-Val-OH. The terminating agent was used to block any N-terminal 





New methods for preparing N N-dialkyltrifluoroacetamides

acetic anhydride or acid peaks had nearly disappeared or an equilibrium volving trifluoroacetic acid and NN-dimethylformamide (less than 10%).



Supporting Information

published protocol.1 Dimethylformamide (DMF) stored over molecular sieves Acetic anhydride t-butanol



Supporting information for the paper Electrosynthesis of Phenyl-2

Electrosynthesis of Phenyl-2-propanone from Benzyl Bromides and Acetic with distilled water to remove unreacted acetic anhydride and DMF the remaining ...



Synthesis and reactions of novel thienotetrahydroisoquinoline

react with phthalic anhydride in acetic acid and DMF to afford phthalimido and isoindolopyrimido thienotetrahy- droisoquinoline 6 7 respectively.



For Analysis Shaping and Chemical Modification : Cellulose

synthesis of cellulose esters with trimellitic anhydride trimethyl acetic anhydride and phthalic anhydride (52). DMF and DMAc may also be used as solvent 



Chemical Compatibility Guide

Acetic Acid — Glacial. B. D. D. C. A. D. D. C. B. D. D. B. A. C. -. -. -. D. D Dimethyl Formamide. A. A. A. A. B. D. D. D. B. -. D. D. -. B. -. -. -. A.



Solvent Miscibility Table

acetic acid acetone acetonitrile benzene n -butanol dimethylformamide dimethyl sulfoxide dioxane ethanol ethyl acetate diethyl ether heptane.