40154-39-0Relevant academic research and scientific papers
[Co(MeTAA)] Metalloradical Catalytic Route to Ketenes via Carbonylation of Carbene Radicals
Chirila, Andrei,van Vliet, Kaj M.,Paul, Nanda D.,de Bruin, Bas
supporting information, p. 2251 - 2258 (2018/04/09)
An efficient synthetic strategy towards beta-lactams, amides, and esters involving “in situ” generation of ketenes and subsequent trapping with nucleophiles is presented. Carbonylation of carbene radical intermediates using the cheap and highly active cobalt(II) tetramethyltetraaza[14]annulene catalyst [Co(MeTAA)] provides a convenient one-pot synthetic protocol towards substituted ketenes. N-tosylhydrazones are used as carbene precursors, thereby bridging the gap between aldehydes and ketenes. Activation of these carbene precursors by the metalloradical cobalt(II) catalyst affords CoIII-carbene radicals, which subsequently react with carbon monoxide to form ketenes. In the presence of a nucleophile (imine, alcohol, or amine) in the reaction medium the ketene is immediately trapped, resulting in the desired products in a one-pot synthetic protocol. The β-lactams formed upon reaction with imines are produced in a highly trans-selective manner.
Synthesis of new pyrazolines and their biological evaluation as antimicrobial agents
Hamadi, Naoufel Ben,Haouas, Amel,Methamem, Mahbouba,Msaddek, Moncef
, p. 563 - 565,3 (2020/09/16)
2-Diazopropane and diazo compounds derived from aromatic aldehydes were reacted with aromatic esters of 3- hydroxyprop-1-yne to give the aromatic esters of 5-hydroxymethyl-3-substituted pyrazoles. Anti-microbial screening using the Gram positive (Staphylo
NOVEL MICROBIOCIDES
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, (2008/06/13)
Compounds of the formula (I) in which the substituents are as defined in claim 1 are suitable for use as microbiocides. Formula (I), wherein X is oxygen or sulfur; A is a 5- or 6-membered heterocyclic ring containing one to three heteroatoms, each independently selected from oxygen, nitrogen and sulphur, or a phenyl ring; the heterocyclic ring or the phenyl being substituted by the groups R6, R7 and R8; R6, R7 and R8 are each, independently, hydrogen, halogen, cyano, nitro, C1 - 4 alky, C1-4 halogenalkyl, C1-4 halogenalkoxy, C1-4 alkoxy(C1-4)alkyl or C1-4halogenalkoxy(C1-4)alkyl, provided that at least one of R6, R7 and R8 is not hydrogen; B is a phenyl, naphthyl or quinolinyl group, which is substituted by one or more substituents R9.
