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Chapter 3 Synthesis of trisubstituted pyrazoles/isoxazoles Mechanism Figure 28: Proposed mechanism for the formation of pyrazole Figure 29: Proposed mechanism for the formation of isoxazole Department of Chemistry <strong>Saurashtra</strong> university, Rajkot-360005 99
Chapter 3 Synthesis of trisubstituted pyrazoles/isoxazoles 3.7 Conclusion In summary, we have synthesized a library of pyrazoles and isoxazoles functionalized with cyclopropyl, thiomethyl and carboxamide moieties in single steps with excellent yield under microwave irradiation. As a part of ‘green chemistry’ approach condensation reaction of various ketene dithioacetals with hydrazine hydrate or hydroxyl amine hydrochloride in solvent free condition under microwave irradiation. The present procedure is significant over the existing methods to develop this class of molecules with excellent yield, purity and simple isolation of products. Department of Chemistry <strong>Saurashtra</strong> university, Rajkot-360005 100
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Saurashtra University Re - Accredit
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Statement under O.Ph.D.7 of Saurash
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I am thankful to FIST/DST and SAP/U
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Chapter 4 Synthesis and Characteriz
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Chapter - 1 Palladium Catalyzed Syn
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Chapter 1 Synthesis of functionaliz
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Chapter - 2 Synthesis and Biologica
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Chapter 2 Synthesis of substituted
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Chapter 2 Synthesis of substituted
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Chapter-5 Synthesis of highly subst
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Chapter 6 Synthesis of benzodiazepi
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pyrazole derivative were faster and
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Conferences participated 1. “15 t
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