potent inhibitor of neuraminidases, a hydrolase that is responsible for processing sialylated glycoconjugates, is a promising drug candidate for various infective diseases. The current study demonstrates that the use of an aglycone-focused library of 2-difluoromethylphenyl α-sialosides is an effective technique to find potent and selective mechanism-basedlabeling reagents for neuraminidases. The focused
The cyclization-carbonylation-cyclizationcouplingreaction (CCC-coupling reaction) of propargyl ureas catalyzed by Pd(II)(box) complexes afforded symmetrical ketones bearing two 2-amino-2-oxazoline groups in good to moderate yields.
Reactions of Acetylenic Amines. VIII. Cyclization of Acetylenic Ureas
作者:Nelson R. Easton、Donald R. Cassady、Robert D. Dillard
DOI:10.1021/jo01030a044
日期:1964.7
AZERBAEV I. N.; TSOJ L. A.; SALIMBAEVA A. D.; CHOLPANKULOVA S. T.; RYSKIE+, TR. IN-TA XIM. HAYK AN KAZSSR, 1980, 52, 128-146
作者:AZERBAEV I. N.、 TSOJ L. A.、 SALIMBAEVA A. D.、 CHOLPANKULOVA S. T.、 RYSKIE+
DOI:——
日期:——
Synthesis of Imidazolidin-2-ones and Imidazol-2-ones via Base-Catalyzed Intramolecular Hydroamidation of Propargylic Ureas under Ambient Conditions
作者:Alessandra Casnati、Antonio Perrone、Paolo P. Mazzeo、Alessia Bacchi、Raffaella Mancuso、Bartolo Gabriele、Raimondo Maggi、Giovanni Maestri、Elena Motti、András Stirling、Nicola Della Ca’
DOI:10.1021/acs.joc.9b00064
日期:2019.3.15
The first organo-catalyzed synthesis of imidazolidin-2-ones and imidazol-2-ones via intramolecular hydroamidation of propargylic ureas is reported. The phosphazene base BEMP turned out to be the most active organo-catalyst compared with guanidine and amidine bases. Excellent chemo- and regioselectivities to five-membered cyclic ureas have been achieved under ambient conditions, with a wide substrate