Career opportunities within science and technology are seeing unprecedented growth across the world, and those who study chemistry or another natural science at university now have increasingly better career prospects. , COA of Formula: https://www.ambeed.com/products/103-47-9.html, 103-47-9, Name is N-Cyclohexyltaurine, molecular formula is C8H17NO3S, belongs to thiazines compound. In a document, author is Hladikova, Veronika, introduce the new discover.
NEW SYNTHETIC APPROACH LEADING TO 1-OR 1,3-DISUBSTITUTED 2-THIOURACIL-5-CARBOXYLATES VIA DIMROTH REARRANGEMENT OF ISOMERIC THIAZINES
Methyl 1-substituted and 1,3-disubstituted-2-thiouracil-5-carboxylates (3b-d) were prepared using new synthetic approach involving base-catalyzed cyclization of easily available S-[3-methoxy-2-(methoxycarbonyl)-3-oxoprop-1-en-1-yl]isothiuronium salts (1a-d) to methyl 2-substituted imino-4-oxo-3,4-dihydro-2H-1,3-thiazine-5-carboxylates (2a-d) and their nucleophile-assisted Dimroth rearrangement to methyl 1-substituted and 1,3-disubstituted-2-thiouracil-5-carboxylates (3b-d). Cyclization step is very sensitive towards the base used – e.g. 1a react with stronger bases or bases in excess to give bis-[3-methoxy-2-(methoxycarbonyl)-3-oxoprop-1-en-1-yl] sulfide (4) as the only isolated product.
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Reference:
Thiazine – an overview | ScienceDirect Topics,
,Thiazine | C4H5NS – PubChem