EUROPEAN JOURNAL OF
PHARMACEUTICAL AND MEDICAL RESEARCH

( An ISO 9001:2015 Certified International Journal )

An International Peer Reviewed Journal for Pharmaceutical, Medical & Biological Sciences

An Official Publication of Society for Advance Healthcare Research (Reg. No. : 01/01/01/31674/16)

European Journal of Pharmaceutical and Medical Research (EJPMR) has indexed with various reputed international bodies like : Google Scholar , Indian Science Publications , InfoBase Index (In Process) , SOCOLAR, China , Research Bible, Fuchu, Tokyo. JAPAN , International Society for Research activity (ISRA) , Scientific Indexing Services (SIS) , Polish Scholarly Bibliography , Global Impact Factor (GIF) (Under Process) , Universal Impact Factor , International Scientific Indexing (ISI), UAE  , Index Copernicus , CAS (A Division of American Chemical Society) USA (Under Process) , Directory of Open Access Journal (DOAJ, Sweden, in process) , UDLedge Science Citation Index , CiteFactor , Directory Of Research Journal Indexing (DRJI) , Indian citation Index (ICI) , Journal Index (JI, Under Process) , Directory of abstract indexing for Journals (DAIJ) , Open Access Journals (Under Process) , Impact Factor Services For International Journals (IFSIJ) , Cosmos Impact Factor , Jour Informatics (Under Process) , Eurasian Scientific Journal Index (ESJI) , International Innovative Journal Impact Factor (IIJIF) , Science Library Index, Dubai, United Arab Emirates , Pubmed Database [NLM ID: 101669306] (Under Process) , IP Indexing (IP Value 2.40) , Web of Science Group (Under Process) , Directory of Research Journals Indexing , Scholar Article Journal Index (SAJI) , International Scientific Indexing ( ISI ) , Scope Database , Academia , 

 ISSN 2394-3211

Impact Factor: 7.065

 ICV - 79.57

Abstract

SYNTHESIS AND CHARACTERIZATION OF ?-AMINO-N-PHENYL SUCCINIMIDE AS PRECURSOR FOR CORRESPONDING THIONIMIDES

Ibrahim S Al-Adham, Zuhair Muhi-Eldeen*, Elham Al-Kaissi, Tawfik Arafat, Bahaa Shafiq

ABSTRACT

The synthesis and structural elucidation of α-amino-N-phenylsuccinimide through the IR, hNMR, ORD, and elemental analysis was described as precursor to thionimides, L-(S)-aspartic acid served as starting material and was utilized to investigate routes applicable to the synthesis of α-amino-N-phenylsuccinimide of known absolute configuration. Various functional groups such as benzyloxycarbonyl group (cbz), t-butyloxycarbonyl group (BOC) were investigated in the synthesis. α-amino group protection utilizing the t-butyloxycarbonyl function proved most applicable to the synthesis of the desired L-α-amino-N-phenylsuccinimide hydrochloride. The five-step synthesis to the α-amino-N-phenylsuccinimide hydrochloride having the known L-(S) absolute configuration involves reaction of L-aspartic acid with some protecting group Z, followed by anhydride formation, reaction with aniline to form the anilide and subsequently ring closer affording the imide. Hydrolysis under mild acid conditions yielded optically pure L-(S)-α-amino-N-phenylsuccinimide. However, all attempts to convert this compound to the desired thionimide were not successful. The five-step sequence of the reactions involving the described protecting group was studied utilizing optical rotatory dispersion as a mean of detecting racemization. The sign of the Cotton effect for various intermediates in the synthesis of the final imide was correlated with the absolute configuration of the asymmetric center. NMR analysis of the ABX type for alicyclic protons of the imide ring was discussed. In all cases NMR analysis of the relatively flat heterocyclic ring showed cis-coupling (8.74-11.90 Hz) to be larger than trans-coupling (4.74-6.79 Hz). As expected, the germinal coupling for the extended π- system was larger than either cis- or trans-coupling.

Keywords: ?-amino-N-phenylsuccinimide, ionizing radiation, Protective agent, Stereochemistry, Optical rotatory dispersion, Alicyclic H-NMR analysis.


[Full Text Article] [Download Certificate]

Citation

  All Since 2019
 Citation  3086  2560
 h-index  18  17
 i10-index  64  44

INDEXING

NEWS & UPDATION

  • New Issue Published

    Its Our pleasure to inform you that, EJPMR 1 March 2024 Issue has been Published, Kindly check it on https://www.ejpmr.com/issue

  • EJPMR: MARCH ISSUE PUBLISHED

    MARCH 2024 issue has been successfully launched on MARCH 2024.

  • EJPMR New Impact Factor

    EJPMR Impact Factor has been Increased to 7.065 for Year 2024.

  • Index Copernicus Value

    EJPMR Received Index Copernicus Value 79.57, due to High Quality Publication in EJPMR at International Level

  • Journal web site support Internet Explorer, Google Chrome, Mozilla Firefox, Opera, Saffari for easy download of article without any trouble.

    .

  • Article Invited for Publication

    Article are invited for publication in EJPMR Coming Issue

Google Scholar Indian Science Publications InfoBase Index (In Process) SOCOLAR, China Research Bible, Fuchu, Tokyo. JAPAN International Society for Research activity (ISRA) Scientific Indexing Services (SIS) Polish Scholarly Bibliography Global Impact Factor (GIF) (Under Process) Universal Impact Factor International Scientific Indexing (ISI), UAE Index Copernicus CAS (A Division of American Chemical Society) USA (Under Process) Directory of Open Access Journal (DOAJ, Sweden, in process) UDLedge Science Citation Index CiteFactor Directory Of Research Journal Indexing (DRJI) Indian citation Index (ICI) Journal Index (JI, Under Process) Directory of abstract indexing for Journals (DAIJ) Open Access Journals (Under Process) Impact Factor Services For International Journals (IFSIJ) Cosmos Impact Factor Jour Informatics (Under Process) Eurasian Scientific Journal Index (ESJI) International Innovative Journal Impact Factor (IIJIF) Science Library Index, Dubai, United Arab Emirates Pubmed Database [NLM ID: 101669306] (Under Process) IP Indexing (IP Value 2.40) Web of Science Group (Under Process) Directory of Research Journals Indexing Scholar Article Journal Index (SAJI) International Scientific Indexing ( ISI ) Scope Database Academia