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|Title:||Synthesis of some new type of thiazolyl coumarins|
Rao, V Rajeswar
|Abstract:||3-(2-Bromoacetyl)coumarins react with thiosemicarbazide in the presence of acetophenone to give [3-(2-hydrazino-4- thiazolyl)coumarino]-phenylmethyl methines 1 in a single step. These compounds can also be obtained by the condensation of acetophenone thiosemicarbazones with 3-(2-bromoacetyl) coumarins in anhyd. ethanol and dimethyl formarnide. Condensation of various 3-(2-bromoacetyl) coumarins with guanyl thiourea in the presence of anhyd. ethanol and dimethyl formamide yields [3-(2-arnino-4-thiazolyl) coumarino]diamino methine 2. The structural assignment of the products is based on elemental analyses and spectral (IR, PMR and MS) data.|
|Appears in Collections:||IJC-B Vol.38B(04) [April 1999]|
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