Photoinduced Reactions. XXXIII. Photochemical Reaction of apara-Quinone Methide
نویسندگان
چکیده
منابع مشابه
Quinone methide intermediates in organic photochemistry*
Quinone methides are widely encountered reactive intermediates in the chemistry of phenols and related compounds. This paper summarizes our recent progress in uncovering new and general photochemical methods for forming quinone methides of various structural types in aqueous solution. Their mechanism of formation and subsequent chemistry are also discussed. New examples of excited-state intramo...
متن کاملTheoretical Confirmation of the Quinone Methide Hypothesis for the Condensation Reactions in Phenol-Formaldehyde Resin Synthesis
The mechanisms for the base-catalyzed condensation reactions in phenol-formaldehyde resin synthesis were investigated by using the density functional theory method. The structures of the intermediates and transition states, as well as the potential energy barriers of the involved reactions, were obtained. The hypothesis of quinine methide (QM) formation was theoretically confirmed. Two mechanis...
متن کاملBioactivation of tamoxifen to metabolite E quinone methide: reaction with glutathione and DNA.
Despite the beneficial effects of tamoxifen in the treatment and prevention of breast cancer, long-term usage of this popular antiestrogen has been linked to an increased risk of developing endometrial cancer in women. One of the suggested pathways leading to the potential toxicity of tamoxifen involves its oxidative metabolism to 4-hydroxytamoxifen, which may be further oxidized to an electrop...
متن کاملControl of reaction pathways in the photochemical reaction of a quinone with tetramethylethylene by metal binding.
The present study reports a novel supramolecular photochemical reaction that focuses on the direct electronic interactions between a host reaction substrate and guest metal salts. The reaction pathways in the photochemical reactions of quinone derivatives bearing a methoxy group and a long oligoether sidearm QEn (n = 0 and 3) with tetramethylethylene (TME) are changed upon noncovalent complexat...
متن کاملThe Reactivity of a Naturally Occurring Quinone (q-255) in Photochemical Reactions of Isolated Chloroplasts.
27 Bortels, H., Zbl. Bakteriol., II, 105, 305 (1942); Bortels, H., Zbl. Bakteriol., 155, 160 (1950); Bortels, H., Die Naturwissenschaften, 38, 165 (1951); Bortels, H., I. J. B. B., 3, Part I, Section F (1959). 28 Sabin, A. B., and A., Lwoff, "The Relation between Reproductive Capacity of Polioviruses at Different Temperatures in Tissue Culture and Neurovirulence," presented at 96th Annual Meeti...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Bulletin of the Chemical Society of Japan
سال: 1969
ISSN: 0009-2673,1348-0634
DOI: 10.1246/bcsj.42.2970