Volume 31 (2020)
Volume 30 (2019)
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Volume 1 (1989)
chemistry
1. The Chemoselective Fischer’s Synthesis of Indolenine Derivatives By iso-Butyric Acid As A Weak Organic Acid Catalyst

sami sajjadifar; Issa Amini; Z. Navabi; Hadi Jabbari; Omidali Pouralimardan

Volume 30, Issue 2 , Spring 2019, , Pages 129-134

http://dx.doi.org/10.22059/jsciences.2019.284702.1007424

Abstract
  Iso-butyric acid as a new, simple, and expensive solvent/catalyst was successfully used for the chemoselective Fischer’s synthesis of indolenines derivatives 3a-r by one-pot condensation reaction of various phenylhydrazines 1a-e with the substituted acetophenones 2a-c at reflux conditions. In this ...  Read More

chemistry
2. Silica Boron Sulfonic Acid as Heterogeneous and Highly Efficient Solid Acid Catalyst For the Preparation of Hantzsch 1,4-dihydropyridines Under Solvent-Free

sami sajjadifar; Pegah Masoudi

Volume 30, Issue 1 , Winter 2019, , Pages 33-40

http://dx.doi.org/10.22059/jsciences.2019.69630

Abstract
  Silica boron sulfonic acid [SiO2–B(OSO3H)3] as an inexpensive, reusable, and Lewis and Brønsted acid catalyst was successfully synthesized, and used for the one-pot three-components synthesis of biologically active substituted Hantzsch 1,4-dihydropyridine derivatives  in the absence ...  Read More