Dhule, India
Dhule, India

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Khairnar B.J.,Jets Zb Patil College | Salunke R.S.,Jets Zb Patil College | Patil P.B.,Jets Zb Patil College | Patil S.A.,Jets Zb Patil College | And 3 more authors.
E-Journal of Chemistry | Year: 2012

A series of novel 3- methyl-7-substituted-4H-1,4-benzothiazine-2- carbohydrazide (3a-e) and corresponding thiosemicarbazides (4-a-q); 2-[3-methyl-7-substituted- 4H -1, 4-benzothiazine-2-yl]-N-(aryl) hydrazine carbothiamide have been synthesized. The thiosemicarbazide when cyclized with iodine via intramolecular cyclisation gave benzothiazonyl oxadiazoles (5-a-q); 5-(3-methyl -7-substitued-4H- 1,4-benzothiazin-2-yl)- N -aryl- 1,3,4- oxadiazol -2-amine and the compounds were tested for antibacterial and antifungal activities against different microorganisms.

Patil T.J.,Jets Zb Patil College
Research Journal of Chemistry and Environment | Year: 2011

Nonionic surfactants cannot withstand elevated temperature and become perceptible even with naked eye known as "clouding", the temperature at which micellar solution breaks up into two phases is referred as a "Cloud Point" (CP). Addition of foreign substance to the surfactant solution does change the temperature at which cloudingphenomenon occurs. It was noted that at 10% surfactant solution, the CP is 66.9 °C. However initially there is decrease in CP with increased surfactant concentration due to increase in micelle concentration. The phase separation results from micelle-micelle interaction. At high surfactant concentration, the CP continues to increase since at high surfactant concentration there exists structured water-surfactant system. With rise in temperature this structure breaks which favors micelle-micelle interaction. The effect of additive on the CP of surfactant is positive. Considering the cloud point as threshold temperature of the solubility, the thermodynamics of the clouding process has been evaluated using "Phase Separation Model".

Girase P.S.,Jets Zb Patil College | Khairnar B.J.,Jets Zb Patil College | Nagarale D.V.,Jets Zb Patil College | Chaudhari B.R.,Jets Zb Patil College
Der Pharma Chemica | Year: 2015

A simple, environmentally benign and highly efficient synthesis of 3, 4-dihydropyrimidin-2(1H)- (thio)one by using microwave promoted aluminium sulphate as a catalyst from aromatic aldehydes, 1, 3-dicarbonyl compounds & (thio)urea in PEG as a reaction solvent is described. Compared with the classical Biginelli reaction conditions, this new method has the advantage of excellent yield and short reaction time. The procedure is simple, rapid and high yielding. The catalyst exhibited a remarkable reactivity and is reusable up to 4 times without significant loss in yields and selectivity in PEG-400 as a solvent.

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