SYNTHESIS OF THIOSEMICARBAZIDE PDF DOWNLOAD

SYNTHESIS OF THIOSEMICARBAZIDE PDF DOWNLOAD

SYNTHESIS OF THIOSEMICARBAZIDE PDF DOWNLOAD!

Synthesis of thiosemicarbazide derivatives. from publication: Synthesis and Biological Evaluation of Thiosemicarbazide Derivatives Endowed with High Activity. Preparation of THIOSEMICARBAZIDE (aminothiourea; semicarbazide, thio-). A solution of ml of concentrated sulfuric acid ( mol) in The new thiosemicarbazide derivatives were synthesized by the reaction of various aldehydes and or ketones with 4-phenylthiosemicarbazide or thiosemicarbazide at room temperature.


SYNTHESIS OF THIOSEMICARBAZIDE PDF DOWNLOAD

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SYNTHESIS OF THIOSEMICARBAZIDE PDF DOWNLOAD


The clear solution is then transferred to a round-bottomed flask fitted with a thermometer well.

SYNTHESIS OF THIOSEMICARBAZIDE PDF DOWNLOAD

A reflux condenser is then attached to the flask, and the solution is maintained at the boiling point for 30 minutes. Synthesis of thiosemicarbazide cooling, a mass of crystals separates; these are removed by filtration.

Five fractions of crystals are obtained from the solution in this manner. E 4-chlorobenzylidene thiosemicarbazide 7 It was obtained as a white solid; yield: E 4-bromobenzylidene thiosemicarbazide 8 It was obtained as a white solid; yield: E 2-nitrobenzylidene thiosemicarbazide 9 It was obtained as a white solid; yield: E 3-nitrobenzylidene thiosemicarbazide 10 It was obtained as a white solid; yield: E 4-nitrobenzylidene synthesis of thiosemicarbazide 11 It was obtained as a white solid; yield: E 4-methylbenzylidene thiosemicarbazide 12 It was obtained as a white solid; yield: E 3-methoxybenzylidene thiosemicarbazide 13 It was obtained as a white solid; yield: E 4-methoxybenzylidene thiosemicarbazide 14 It was obtained as a white solid; yield: E 2,4-dimethoxybenzylidene thiosemicarbazide 15 It was obtained as a white solid; yield: E furanyl methylene thiosemicarbazide 16 It was obtained as a brown powder; yield: E 3-fluorobenzylidene phenylthiosemicarbazide 17 It was obtained as a white solid; yield: E 3-chlorobenzylidene phenylthiosemicarbazide 18 It was obtained as a white solid; yield: E 3-bromobenzylidene phenylthiosemicarbazide 19 It was obtained as a white solid; yield: E 4-fluorobenzylidene phenylthiosemicarbazide 20 It was obtained as a white solid; yield: E 4-chlorobenzylidene phenylthiosemicarbazide 21 It was obtained as a white solid; yield: E 4-bromobenzylidene phenylthiosemicarbazide synthesis of thiosemicarbazide It was obtained as a white solid; yield: E 2-nitrobenzylidene phenylthiosemicarbazide 23 It was obtained as a yellow solid; yield: E 3-nitrobenzylidene phenylthiosemicarbazide 24 It was obtained as a yellow solid; yield: E 4-nitrobenzylidene phenylthiosemicarbazide 25 It was obtained as a white solid; yield: E 4-methylbenzylidene phenylthiosemicarbazide 26 It was obtained as a white solid; yield: E 3-methoxybenzylidene phenylthiosemicarbazide 27 It was obtained as a white solid; yield: E 4-methoxybenzylidene phenylthiosemicarbazide 28 It was obtained as a white solid; yield: Althou h we are not certain of theintermediate formed during this rearrangement, it would seem that this reaction might follow the steps indicated below: At the temperature of reaction, the hydrazine salt may decompose into free hydrazine and thiocyanic acid which may recombine as indicated above.

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