نتایج جستجو برای: cyclopentanone
تعداد نتایج: 199 فیلتر نتایج به سال:
The cyclopentanone and cyclopentenone group of fragrance ingredients was critically evaluated for safety following a complete literature search. For high end users, calculated maximum dermal exposures vary from 0.002% to 15.16% in hydroalcoholic products; systemic exposures vary from 0.0003 to 0.7122 mg/kg/day. The cyclopentanones and cyclopentenones had a low order of acute toxicity and no sig...
In situ formed Li/Cl phosphinidenoid complexes [Li(12-crown-4)][M(CO)5(ClPC5Me5)] 3a-c (M = Cr, Mo, W) reacted with cyclobutanone (4), cyclopentanone (5) and cyclohexanone (6) in Et2O to yield the first P-C5Me5 substituted C(3)-spirofused oxaphosphirane complexes 7a-c, 8a and 9a,a'. In the case of cyclopentanone and 1a the outcome of the reaction in THF was different: here the formation of 8a a...
Antimicrobial photodynamic therapy (aPDT) has been proposed to cope with the increasing antibiotic resistance among pathogens. As versatile pharmacophores, benzylidene cyclopentanone based photosensitizers (PSs) have been used in various bioactive materials. However, their reports as aPDT agents are very limited, and relationships between their chemical structures and antibacterial abilities ha...
Part I: The synthesis of 2-vinylindole, the parent of 2-alkenylindoles, has been achieved in three steps (70-76% yield) based on a novel allene cyclization developed in our laboratory. 2-Alkenylindoles have found use as precursors to indole and carbazole alkaloids via the Diels-Alder reaction. The key step of the synthesis involves isomerization of an arylacetylenecarbamate to an arylallenecarb...
Reaction of methyl undec-10-enoate 2 with cyclopentanone 1a affords two products, methyl 2-(2′-cyclopentanonyl)undec-10-enoate 3a and methyl 11-(2′-cyclopentanonyl)undecanoate 4a. Similarly, the reaction of cyclohexanone 1b gives two products 3b and 4b. Compounds 4a and 4b on further reaction with mercaptoacetic acid and ammonium carbonate yield the products 5a and 5b, respectively. Products ha...
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