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Study of Ring Closure Reaction of Substituted Phenyl N-(2-thiocarbamoylphenyl)carbamates Catalysed by Methoxide Ion

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F06%3A00004377" target="_blank" >RIV/00216275:25310/06:00004377 - isvavai.cz</a>

  • Result on the web

  • DOI - Digital Object Identifier

Alternative languages

  • Result language

    angličtina

  • Original language name

    Study of Ring Closure Reaction of Substituted Phenyl N-(2-thiocarbamoylphenyl)carbamates Catalysed by Methoxide Ion

  • Original language description

    Studies were made of the kinetics of methoxide ion-catalysed reactions of seven substituted phenyl N-(2-thiocarbamoylphenyl)carbamates, 4-methoxyphenyl N-(2-thiocarbamoylphenyl)-N-(methyl)carbamate and five substituted phenyl N-(4-thiocarbamoylphenyl)carbamates, leading to the respective cyclisation products (i.e. 4-thioxo-1H,3H-quinazolin-2-one or 1-methyl-4-thioxo-1H,3H-quinazolin-2-one) and/or methanolysis product, i.e. methyl N-(4-thiocarbamoylphenyl)carbamate. It was found that the ring closure reaction proceeds by the BAc2 mechanism with the splitting off of phenoxide anion being the rate-limiting step, while the methanolysis follows the E1cB mechanism. The ring closure reaction of 4-methoxyphenyl N-(2-thiocarbamoyl)-N-(methyl)carbamate proceedskinetically in two steps.

  • Czech name

    Studium cyklizační reakce substituovaných fenyl N-(2-thiokarbamoylfenyl)karbamátů katalyzované methanolátovým iontem

  • Czech description

    Byla studována kinetika reakce sedmi substitutovaných fenyl N-(2-thiokarbamoylfenyl)karbamátů, 4-methoxyfenyl N-(2-thiokarbamoylfenyl)-N-(methyl)karbamátu a pěti substituovaných fenyl N-(4-thiokarbamoylfenyl)karbamátů s metahnolátem sodným poskytující odpovídající produkty cyklizace (tj. 4-thioxo-1H,3H-chinazolin-2-on nebo 1-methyl-4-thioxo-1H,3H-chinazolin-2-on) a methanolýzy , tj. methyl N-(4-thiokarbamoylfenyl)karbamát. Bylo zjištěno, že cyklizace probíhá BAc2 mechanismem s rychlost určujícím odštěpováním fenolátového aniontu , kdežto methanolýza probíhá E1cB mechanismem. Cyklizace 4-methoxyfenyl N-(2-thiokarbamoyl)-N-(methyl)karbamátu probíhá kineticky ve dvou krocích.

Classification

  • Type

    J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

  • CEP classification

    CC - Organic chemistry

  • OECD FORD branch

Result continuities

  • Project

  • Continuities

    Z - Vyzkumny zamer (s odkazem do CEZ)

Others

  • Publication year

    2006

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Journal of Physical Organic Chemistry

  • ISSN

    0894-3230

  • e-ISSN

  • Volume of the periodical

    19

  • Issue of the periodical within the volume

    1

  • Country of publishing house

    GB - UNITED KINGDOM

  • Number of pages

    7

  • Pages from-to

    61-67

  • UT code for WoS article

  • EID of the result in the Scopus database