The role of acetone solvent in the reaction of 3-chloropropionyl-and 2-chloropropionyl-isothiocyanate with hydrazine

Syadza Firdausiah, Siti Aishah Hasbullah, Bohari M. Yamin

Research output: Contribution to journalConference article

Abstract

The reaction of 3-chloropropionylisothiocyanate with hydrazine did not give the expected bis(3-chloropropionylthioureido)hydrazine but instead 3-Chloro-N-[5,5-dimethyl-4-(4-oxo-5,6-dihydro-4H-[1,3]thiazin-2-yl)-4,5-dihydro-[1,3,4]thiadiazol-2-yl]-propionamide 2 was obtained with 23.56% yield. On the other hand 2-thiocyanatopropionylisothiocyanate undergoes crisscross cycloaddition leading to the formation of 3,3,7,7-Tetramethyl-tetrahydro-[1,2,4]triazolo[1,2-a][1,2,4]triazole-1,5-dithione 1 with 96.1% yield. The mechanisms involving the acetone solvent for both reactions are discussed. Both compounds were evaluated to their antioxidant activity using DPPH radical scavenging method. The results shows that compound 2 with EC50 > 1000 μM is less active than 1 (EC50 of 76 μM) may be due to the S-alkylated on the structure which eliminated its activity. Compound 1 showed higher activity than ascorbic acid (EC50 of 561.36 μM) so that it is potential as antioxidant agent.

Original languageEnglish
Article number32036
JournalJournal of Physics: Conference Series
Volume1341
Issue number3
DOIs
Publication statusPublished - 7 Nov 2019
Event3rd International Conference on Science, ICOS 2019 - Makassar, India
Duration: 26 Jul 201927 Jul 2019

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hydrazines
acetone
antioxidants
ascorbic acid
scavenging
cycloaddition

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

The role of acetone solvent in the reaction of 3-chloropropionyl-and 2-chloropropionyl-isothiocyanate with hydrazine. / Firdausiah, Syadza; Hasbullah, Siti Aishah; Yamin, Bohari M.

In: Journal of Physics: Conference Series, Vol. 1341, No. 3, 32036, 07.11.2019.

Research output: Contribution to journalConference article

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abstract = "The reaction of 3-chloropropionylisothiocyanate with hydrazine did not give the expected bis(3-chloropropionylthioureido)hydrazine but instead 3-Chloro-N-[5,5-dimethyl-4-(4-oxo-5,6-dihydro-4H-[1,3]thiazin-2-yl)-4,5-dihydro-[1,3,4]thiadiazol-2-yl]-propionamide 2 was obtained with 23.56{\%} yield. On the other hand 2-thiocyanatopropionylisothiocyanate undergoes crisscross cycloaddition leading to the formation of 3,3,7,7-Tetramethyl-tetrahydro-[1,2,4]triazolo[1,2-a][1,2,4]triazole-1,5-dithione 1 with 96.1{\%} yield. The mechanisms involving the acetone solvent for both reactions are discussed. Both compounds were evaluated to their antioxidant activity using DPPH radical scavenging method. The results shows that compound 2 with EC50 > 1000 μM is less active than 1 (EC50 of 76 μM) may be due to the S-alkylated on the structure which eliminated its activity. Compound 1 showed higher activity than ascorbic acid (EC50 of 561.36 μM) so that it is potential as antioxidant agent.",
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N2 - The reaction of 3-chloropropionylisothiocyanate with hydrazine did not give the expected bis(3-chloropropionylthioureido)hydrazine but instead 3-Chloro-N-[5,5-dimethyl-4-(4-oxo-5,6-dihydro-4H-[1,3]thiazin-2-yl)-4,5-dihydro-[1,3,4]thiadiazol-2-yl]-propionamide 2 was obtained with 23.56% yield. On the other hand 2-thiocyanatopropionylisothiocyanate undergoes crisscross cycloaddition leading to the formation of 3,3,7,7-Tetramethyl-tetrahydro-[1,2,4]triazolo[1,2-a][1,2,4]triazole-1,5-dithione 1 with 96.1% yield. The mechanisms involving the acetone solvent for both reactions are discussed. Both compounds were evaluated to their antioxidant activity using DPPH radical scavenging method. The results shows that compound 2 with EC50 > 1000 μM is less active than 1 (EC50 of 76 μM) may be due to the S-alkylated on the structure which eliminated its activity. Compound 1 showed higher activity than ascorbic acid (EC50 of 561.36 μM) so that it is potential as antioxidant agent.

AB - The reaction of 3-chloropropionylisothiocyanate with hydrazine did not give the expected bis(3-chloropropionylthioureido)hydrazine but instead 3-Chloro-N-[5,5-dimethyl-4-(4-oxo-5,6-dihydro-4H-[1,3]thiazin-2-yl)-4,5-dihydro-[1,3,4]thiadiazol-2-yl]-propionamide 2 was obtained with 23.56% yield. On the other hand 2-thiocyanatopropionylisothiocyanate undergoes crisscross cycloaddition leading to the formation of 3,3,7,7-Tetramethyl-tetrahydro-[1,2,4]triazolo[1,2-a][1,2,4]triazole-1,5-dithione 1 with 96.1% yield. The mechanisms involving the acetone solvent for both reactions are discussed. Both compounds were evaluated to their antioxidant activity using DPPH radical scavenging method. The results shows that compound 2 with EC50 > 1000 μM is less active than 1 (EC50 of 76 μM) may be due to the S-alkylated on the structure which eliminated its activity. Compound 1 showed higher activity than ascorbic acid (EC50 of 561.36 μM) so that it is potential as antioxidant agent.

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