K2S2O8-promoted direct thiocyanation of pyrazolin-5-ones with ammonium thiocyanate at room temperature
Sign Up to like & getrecommendations! Published in 2020 at "Organic chemistry frontiers"
DOI: 10.1039/c9qo01174a
Abstract: A facile and efficient approach for the direct thiocyanation of pyrazolin-5-ones via a radical mechanism has been established for the first time. A series of 4-thiocyanated 5-hydroxy-1H-pyrazoles were synthesized in fair to good yields by… read more here.
Keywords: k2s2o8 promoted; direct thiocyanation; pyrazolin ones; thiocyanation pyrazolin ... See more keywords
Access to 1-aryl-pyrazolin-5-ones via photoinduced chemoselective cyclization of N-methacrylo aldehyde hydrazones.
Sign Up to like & getrecommendations! Published in 2024 at "Chemical communications"
DOI: 10.1039/d4cc05976j
Abstract: A photocatalytic sulfamoylation/5-endo-trig cyclization of (E)-N'-arylidene-N-phenylmethacrylohydrazides with sulfamoyl chlorides was developed. The chemoselective intramolecular addition of the carbon-centered radical intermediate to the CN bond in the hydrazone motif gave the sulfamoylated pyrazolin-5-one. Besides, sulfonyl chlorides… read more here.
Keywords: ones via; aryl pyrazolin; access aryl; pyrazolin ones ... See more keywords