Title:Recursive Partitioning Analysis and Anti-Tubercular Screening of 3- Aminopyrazine-2-Carbohydrazide Derivatives
VOLUME: 16 ISSUE: 11
Author(s):Pankaj Miniyar*, Anand Mahajan, Dattatray Anuse, Ashish Kumar, Mahesh Barmade, Dhiman Sarkar, Manisha Arkile and Vijay Khedkar
Affiliation:Department of Pharmaceutical Chemistry, Sinhgad Institute of Pharmacy, Narhe, Pune- 411041, Affiliated to Savitribai Phule Pune University, Ganeshkhind, Pune 411007, Goa College of Pharmacy, 18th June Road, Panaji, Goa 403 001, Department of Pharmaceutical Chemistry, Sinhgad Institute of Pharmacy, Narhe, Pune- 411041, Affiliated to Savitribai Phule Pune University, Ganeshkhind, Pune 411007, Department of Pharmaceutical Chemistry, Sinhgad Institute of Pharmacy, Narhe, Pune- 411041, Affiliated to Savitribai Phule Pune University, Ganeshkhind, Pune 411007, The M.S. University of Baroda, Vadodara 390001, CombiChem Bio Resource Center, National Chemical Laboratory, Pune 411008, CombiChem Bio Resource Center, National Chemical Laboratory, Pune 411008, CombiChem Bio Resource Center, National Chemical Laboratory, Pune 411008
Keywords:3-aminopyrazine, carbohydrazide, anti-tubercular activity, lyophilization, QSAR, recursive partitioning.
Abstract:
Background: Treating tuberculosis is a challenge due to the development of drug
resistance. Hence, it is imperative to develop novel leads having high potency and efficacy to curb
drug resistance.
Methods: The present research work is focused on microwave-assisted synthesis of novel twenty-six
3-amino-N’-benzylidenepyrazine-2-carbohydrazide derivatives (3a-z), where, lyophilization
technique was used for isolation of the major intermediate, 3-aminopyrazin-2-carbohydrazide. All
synthesized compounds were subjected for anti-tubercular screening against Mycobacterium
tuberculosis H37Ra by using XTT Reduction Menadione Assay (XRMA) protocol.
Results: Out of 26 synthesized compounds, four N’-substitutedbenzaldehyde-3-amino-pyrazine-2-
carbohydrazide derivatives viz. 3i, 3j 3v and 3z showed significant activity against M. tuberculosis
H37Ra. The compounds 3i, 3j, 3v and 3z showed 99, 98, 92 and 87 % inhibition respectively as
compared to 94% inhibition shown by the standard drug rifampicin. The MIC and IC50 values were in
the range of 24.3-110 and 5.9-20.8 µg/ml respectively.
Conclusion: A classification model called Recursive Partitioning (RP) based on binary Quantitative
Structure-Activity Relationship (QSAR) was derived for the establishment of structure-activity
relationship (SAR). The predictions derived on the basis of RP model were found to be in agreement
with anti-tubercular screening data.