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Published on:May 2020
Indian Journal of Pharmaceutical Education and Research, 2020; 54(2s):s330-s336
Original Article | doi:10.5530/ijper.54.2s.90

Total Synthesis of Clausenain, a Cyclic Octapeptide and its Analog for Anticancer Activity

Authors and affiliation (s):

Nirmala Shinde1,* Avinash Shridhar Dhake1, Kishan Prabhu Haval2, Sachin Kawaduji Bhosale1

1Department of Pharmaceutical Chemistry, S.M.B.T. College of Pharmacy, Nandi Hills, Dhamangaon. Igatpuri, Nashik, Maharashtra, INDIA.

2Department of Chemistry, Dr. Babasaheb Ambedkar Marathwada University, (Subcentre) Osmanabad, Maharashtra, INDIA.


Keeping in mind requisite of today’s era for development of new anticancer drugs, synthesis of a phenyl alanine rich cyclic octapeptide Clausenain and its analog by solution phase technique is described here. It was done through coupling a tetrapeptide BOC-Phe-Ser-Leu-Phe–OMe with another tetrapeptide BOC-Phe-Gly-Leu-Phe-OMe after proper deprotection towards carboxyl and amino terminals. The N-methyl analog of this octapeptide was prepared with N-methylated Glycine instead of Glycine as starting material. The linear peptides were then cyclized using suitable procedure. The establishment of structure for synthesized compounds was done by spectral and elemental analysis. Evaluation of synthesized compounds was done by brine shrimp lethality assay and further screening was done using a panel of 60 human tumor cell lines. The cyclic octapeptide and its analog showed good activity against cells lines of Leukemia, Non-small cell lung cancer, CNS cancer, breast cancer and renal cancer in comparison with vincristine as standard. The N-methylated analog was found to be more active than the cyclic peptide.

Key words: Octapeptide, Solution phase technique, p-nitro phenyl ester method, Brine shrimp, Anticancer, Tumor cell lines.



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The Official Journal of Association of Pharmaceutical Teachers of India (APTI)
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Indian Journal of Pharmaceutical Education and Research (IJPER) [ISSN-0019-5464] is the official journal of Association of Pharmaceutical Teachers of India (APTI) and is being published since 1967.


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