928053-39-8Relevant academic research and scientific papers
Synthesis of Indazolones via Friedel-Crafts Cyclization of Blocked (Masked) N-Isocyanates
Elkaeed, Eslam B.,An, Jing,Beauchemin, André M.
, p. 9890 - 9897 (2017/09/23)
Nitrogen-substituted isocyanates (N-isocyanates) are rare amphoteric reagents with high, but underdeveloped synthetic potential. Herein, we study the formation of indazolones by Friedel-Crafts cyclization of N-isocyanates using blocked (masked) N-isocyanate precursors: the effect of the masking group and the reaction scope have been delineated. Substrate synthesis has also been improved using a reported copper-catalyzed coupling of arylbismuth(V) reagents that is compatible with the hemilabile OPh blocking group.
N-Boc-O-tosyl hydroxylamine as a safe and efficient nitrogen source for the N-amination of aryl and alkyl amines: Electrophylic amination
Baburaj, Thankappan,Thambidurai, Sivalingam
, p. 1993 - 1996 (2011/10/08)
β-Boc-protected aryl and alkyl hydrazines, useful intermediates for azapeptides and N-substituted pyrazoles, were synthesized by electrophylic amination methodology, using less energetic N-Boc-O-tosyl hydroxylamine as an efficient nitrogen source. Also we have demonstrated a two-step, chromatography-free synthesis of N-Boc-O-tosyl hydroxylamine. Georg Thieme Verlag Stuttgart - New York.
Pyrazolones as inhibitors of 11B-hydroxysteroid dehydrogenase
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Page/Page column 26, (2008/06/13)
Provided herein are compounds of the formula (I): as well as pharmaceutically acceptable salts thereof, wherein the substituents are as those disclosed in the specification. These compounds, and the pharmaceutical compositions containing them, are useful for the treatment of diseases such as, for example, type II diabetes mellitus and metabolic syndrome.
