benzophenone

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benzophenone

[¦ben·zō·fə′nōn]
(organic chemistry)
C6H5COC6H6 A diphenyl ketone, boiling point 305.9°C, occurring in four polymorphic forms (α, β, γ, and δ) each with different melting point; used as a constituent of synthetic perfumes and as a chemical intermediate. Also known as diphenyl ketone; phenyl ketone.
References in periodicals archive ?
In this work, the GC-MS analysis of the propolis extracts showed that major compounds of propolis from Cundinamarca were rich in diterpenic acids; while that of the propolis from Antioquia and Huila regions, were rich in prenylated benzophenones and triterpenes respectively (Table 1).
First, through reading and integration of abundant information from the literature, we summarized the fragmentation patterns of five kinds of compounds (steroidal saponins, flavonoids, phenylpropanoids, alkaloids, and benzophenones) in Rhizoma Anemarrhenae.
It is a rich source of xanthones, benzophenones, flavonoids, biflavonoids and triterpenes [2, 3] of significant antimicrobial, anti- inflammatory, antioxidant, anticancer and anti HIV activities [4-6].
Benzophenones (1 = cariphenone A; 2 = cariphenone B) and benzopyrans (3 = 6-isobutyryl-5,7-dimethoxy-2,2-dimethyl-benzopyran (HP1); 4 = 7-hydroxy-6-isobutyryl-5-methoxy-2,2-dimethyl-benzopyran (HP2); 5 = 5-hydroxy-6-isobutyryl-7-methoxy-2,2-dimethyl-benzopyran (HP3)) were eluted with an isocratic mobile phase system consisting of C[H.sub.3]CN:[H.sub.2]O (60:40, v/v) and detection at 270 nm.
First used as a preserver to extend the shelf life of paints, varnishes, and other industrial products, benzophenones were added to sunscreens in the 1950s.
The composition combines the beneficial synergistic effects of polyisoprenylated benzophenones, stilbenes and anthocyanins to enable weight loss.
Generally, as a possible way to solve the problem of POM photostabilization, a series of ultraviolet (UV) stabilizers have been successfully used to prevent polymeric materials from aging induced by sunlight, such as benzophenones, benzotriazoles, triazines, and hindered amine light stabilizers.
For example, certain benzophenones, dichlorophenols, parabens, and the compound triclosan have been shown to disrupt estrogen receptor signaling in animal and in vitro models either by binding directly to the receptor itself or through modulation of downstream signaling processes (Akahori et al.
(12) In fact, the very commonly used benzophenones and salicylates demonstrate more antiandrogenic activity than that of flutamide, the antiandrogen drug given to prostate cancer patients to stop the influence of testosterone in the effort to slow prostate cancer growth.
Its relationship with Viachem, a supplier of specialty and fine chemicals, enables the company to increase market share for its MAXGARD brand of substituted benzophenones, according to Jimmy Wooten, global product manager for Syrgis Performance Specialties.
Benzhydrylamines can be synthesized from benzophenones by the Leuckart reaction via the intermediate benzhydrylformamides.
Benzophenones have received mixed reviews; their use in sunscreen products now warrants a warning label in the European Union.