Alginic acid: A mild and renewable bifunctional heterogeneous biopolymeric organocatalyst for efficient and facile synthesis of polyhydroquinolines.
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2018
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Abstract
Alginic acid, a widely used naturally occurring carbohydrate which is generally derived from brown seaweeds, can be considered as a bifunctional heterogeneous and green biopolymeric organocatalyst. Alginic acid, without any post-modification with active Bronsted or Lewis acid centers, was found to be a highly active, cost-effective, commercially-available, renewable and recoverable heterogeneous biopolymeric organocatalyst for the expeditious synthesis of polyhydroquinolines (PHQs). Polyhydroquinolines were synthesized from the four-component Hantzsch reaction of ethyl acetoacetate, different aldehydes, ammonium acetate and cyclic 1,3-diones under mild conditions in high to quantitative yields, 75-97%, using alginic acid. Furthermore, alginic acid was found to be reusable for at least 6 consecutive cycles without considerable loss of its catalytic activity.
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dekamin2018alginicinternational
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| Authors | Dekamin, Mohammad G;Karimi, Zahra;Latifidoost, Zahra;Ilkhanizadeh, Siamand;Daemi, Hamed;Naimi-Jamal, M Reza;Barikani, Mehdi; |
| Journal | International journal of biological macromolecules |
| Year | 2018 |
| DOI |
S0141-8130(17)32145-1
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