An unusual synthesis of 3-(2-(arylamino)thiazol-4-yl)-2H-chromen-2-ones from ethyl 2-(chloromethyl)-2-hydroxy-2H-chromene-3-carboxylate via benzopyran ring opening
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DOI: 10.1007/s11030-018-9880-x
Abstract: An unusual and unexpected synthesis of 3-(2-(arylamino)thiazol-4-yl)-2H-chromen-2-ones has been observed by the reaction of ethyl 2-(chloromethyl)-2-hydroxy-2H-chromene-3-carboxylate with various arylthioureas in ethanol under mild reaction conditions with excellent yields. The ambiguity in the structure of the… read more here.
Keywords: chloromethyl hydroxy; ethyl chloromethyl; arylamino thiazol; thiazol chromen ... See more keywords
Synthesis of 2-arylamino-5-formyl-pyrimidines from the bis(hexafluorophosphate) Arnold salt
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DOI: 10.1177/1747519820911271
Abstract: A three-step synthesis of 2-arylamino-5-formyl-pyrimidines is developed by condensation of the bis(hexafluorophosphate) Arnold salt with N-arylguanidines. This method conveniently provides the corresponding 2-arylaminopyrimidine derivatives in good yields. read more here.
Keywords: formyl pyrimidines; arylamino formyl; hexafluorophosphate arnold; arnold salt ... See more keywords