Abstract Herbicide resistance is a worldwide problem in weed control. This prompts researchers to look for new modes of action slow down the evolution herbicide-resistant weeds. research aims determine herbicidal thiazolo[3,2-a]pyrimidines derivatives, which are well known as antihypertensive drugs. The phytotoxic effects ten compounds were investigated using leaf disc discoloration test and se...

the method cited in the literature for synthesis of 1,2- dihydro 3- thioxo - 1,2,4- benzotriazine 1 was improved .1 was condensed with propargyl bromide to afford 3 - propargylthio – 1,2,4 -benzotriazine 5. transformation of this compound to 9h-3- methylthiazolo [2,3-c] [1,2,4] benzotriazine ( 3, r = me) was performed in the presence of na o me / meoh . orientation of this selective cyclization...

The possible origin of luminescent properties of biodegradable photoluminescent polyesters (BPLPs) has been revealed by isolation and identification of luminescent agent from the hydrolyzate of BPLP. Elemental analysis, ESI-MS, (1)H, (13)C, 2D HSQC and COSY NMR spectra confirmed the chemical structure as 5-oxo-2,3-dihydro-5H-[1,3]thiazolo[3,2-a]pyridine-3,7-dicarboxylic acid (TPA).

Two new Cu(II)-based coordination polymers, one of which is the {[Cu(?3-fdc)(?-dptztz)(H2O)]·DMF}n (1) and another {[Cu(?3-tdc)(?-dptztz)]·DMF}n (2) (fdc = 2,5-furandicarboxylate, dptztz 2,5-di(4-pyridyl)thiazolo[5,4-d]thiazole tdc 2,5-thiophenedicarboxylate,) were synthesized by Cu(NO3)2·3H2O reacting with different carboxylate ligands (H2fdc H2tdc for 1 2, respectively). Single-crystal X-ray ...

A library of thirty eight novel thiazolo[5,4-f]quinazolin-9(8H)-one derivatives (series 8, 10, 14 and 17) was prepared via the Hügershoff reaction and a Cu catalyzed intramolecular C-S bond formation, helped by microwave-assisted technology when required. The efficient multistep synthesis of the key 6-amino-3-cyclopropylquinazolin-4(3H)-one (3) has been reinvestigated and performed on a multigr...

An operationally simple approach for the stereoselective tandem synthesis of novel thiazolo fused naphthyridines and thienopyridines by the reaction of o-alkynylaldehydes with L-cystine methyl ester hydrochloride via Au(III)-catalyzed regioselective 6-endo-dig ring closure under mild reaction conditions is described. It is noteworthy that alkynes bearing an alkyl and a strong electron-withdrawi...