Recently I am researching about ANTITUMOR-ACTIVITY; ORGANIC-SYNTHESIS; GREEN SYNTHESIS; DERIVATIVES; ANTIOXIDANT; 4-HYDROXYCOUMARIN; CHEMISTRY; CANCER, Saw an article supported by the Special Assistance Programme SAP, University Grants Commission, New Delhi, India. Safety of 3-Hydroxybenzaldehyde. Published in TAYLOR & FRANCIS INC in PHILADELPHIA ,Authors: Chate, AV; Shaikh, BA; Bondle, GM; Sangle, SM. The CAS is 100-83-4. Through research, I have a further understanding and discovery of 3-Hydroxybenzaldehyde
The present work describes eco-friendly multicomponent protocol for the synthesis in excellent yields of structurally diverse benzylpyrazolyl coumarin 5 (a-s) involving the reaction of 4-hydroxycoumarin, ethyl acetoacetate, hydrazine hydrate/phenyl hydrazine hydrate and aldehydes, also novel pyrano[2,3-c]pyrazole derivatives 8 (a-k) integrated by isonicotinic acid hydrazide from reaction of aldehyde, ethyl acetoacetate, malononitrile with isoniazid, employing water as a reaction medium and 2-aminoethanesulfonic acid (taurine) as the catalyst. This new methodology endowed the advantages such as short reaction time, recovery of catalysts after catalytic reaction and reusing them without losing their activity and alleviate of operation. [GRAPHICS] .
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Reference:
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
,Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles