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Devanand B. Shinde,Rahul R. Nagawade 대한화학회 2005 Bulletin of the Korean Chemical Society Vol.26 No.12
Zirconium(IV) chloride is found to be an efficient catalyst for the electrophilic addition reaction of indole with aldehydes/ketones to afford the corresponding bis(indolyl)methanes in good yields. The remarkable features of this new procedure are high conversions, shorter reaction times, cleaner reaction profiles and simple experimental and work-up procedures
Nagawade, Rahul R.,Shinde, Devanand B. Korean Chemical Society 2005 Bulletin of the Korean Chemical Society Vol.26 No.12
Zirconium(IV) chloride is found to be an efficient catalyst for the electrophilic addition reaction of indole with aldehydes/ketones to afford the corresponding bis(indolyl methanes in good yields. The remarkable features of this new procedure are high conversions, shorter reaction times, cleaner reaction profiles and simple experimental and work-up procedures.
Sushilkumar S. Bahekar,Devanand B. Shinde Korean Chemical Society 2003 대한화학회지 Vol.47 No.3
소염작용을 가진 일련의 싸이아졸리딘아세트산 유도체들을 싸이오유레아와 말레산무수물로부터 합성하고 분광학적인 방법으로 구조를 확립하였다. 또한 이 화합물들의 소염작용을 표준시약인 디클로펜악 소듐과 비교한 결과 어느정도의 효과를 가지고 있음을 검정하였다. A synthetic method for the title compounds (2a-o) was carried out. The title compounds (2a-o)were prepared by the condensation of various thioureas and maleic anhydride. Anti-inflammatory activities in vivo were evaluated and compared with standard drug diclofenac sodium. Some compounds showed moderate activity. The structures of all the new compounds were established on the basis of $^1H$ NMR and IR spectral data.
Darandale, Sunil N.,Sangshetti, Jaiprakash N.,Shinde, Devanand B. Korean Chemical Society 2012 대한화학회지 Vol.56 No.3
A simple, convenient and practical green synthetic protocol for sodium bisulfite catalyzed multicomponent reaction of ethyl acetoacetate, hydrazine hydrate, malononitrile, and various aldehydes for the synthesis of 6-amino-4-phenyl-3-methyl-2,4-ihydropyrano[2,3-c]pyrazole-5-carbonitriles using ultrasound irradiations in solvent free condition. This method provides the advantage of operational simplicity, shorter reaction time and excellent yields making the protocol environment friendly and economically lucrative.
Ajit A. Patil,Bhusari S. Sachin,Pravin S. Wakte,Devanand B. Shinde 한국약제학회 2013 Journal of Pharmaceutical Investigation Vol.43 No.3
The supercritical carbon dioxide-assisted extraction (SC CO2E) process was optimized for extracting picroside I and picroside II from Picrorhiza scrophulariiflora rhizomes. The picroside I and picroside II content was determined using validated LC–MS methodology. The response surface methodology (RSM) was employed to study quantitative effects of extraction parameters viz. operating pressure, temperature, modifier concentration and extraction time using Box–Behnken design. The experimental data were fitted to second-order polynomial equation using multiple regression analysis and analyzed using the appropriate statistical method. By solving the regression equation and analyzing 3D plots, the optimum extraction conditions were found to be: extraction pressure, 25 MPa;temperature, 40 C; modifier concentration, 15 % and extraction time, 90 min. The effect of four different ionic liquids (IL) as a modifier additive has been investigated using optimized SCCO2E conditions. None of the IL showed equivalent or enhanced recovery of analytes of interest. The conventional hot percolation of P. scrophulariiflora powder resulted in 23.69 ± 1.02 and 10.22 ± 0.71 mg g-1 picroside I and II, respectively, after an extraction period of 6 h whereas SC CO2E with methanol as modifier showed 33.14 ± 1.23 and 16.77 ± 0.82 mg g-1 recovery of picroside I and II, respectively in 90 min. The comparison of yield and extraction time demonstrated that SC CO2E using methanol as modifier is more efficient than conventional hot percolation method.