Design and synthesis of diphenyldiazomethanes possessing stable aminoxyl radicals: photolytic generation of quartet species and their reaction with C60
2,6-Dicarboxypyridinium Chlorochromate. An Efficient and Selective Reagent for the Mild Deprotection of Acetals, Thioacetals, and 1,1-Diacetates to Carbonyl Compounds
chlorochromate (2,6- DCPCC ) was found to be an efficientreagent for the conversion of acetals, thioacetals, and 1,1-diacetates to their corresponding carbonyl compounds under neutral and anhydrous conditions in good to excellent yields. Selectivedeprotection of acetals or 1,1-diacetates in the presence of thioacetals at room temperature is also observed with this reagent.
Benzophenone boronic acid photoaffinity labeling of subtilisin CMMs to probe altered specificity
作者:Grace DeSantis、Christian Paech、J.Bryan Jones
DOI:10.1016/s0968-0896(99)00320-x
日期:2000.3
photoprobe, was used to study the differences in the topology of the S1 pocket of chemically modified mutantenzymes (CMMs). The BBP proved to be an effective competitive inhibitor and a revealing active site directed photoprobe of the CMMs of the serine protease subtilisinBacilluslentus (SBL) which were chemically modified with the hydrophobic, negatively charged and positively charged moieties
Multiple-photon chemistry in the benzophenone photoreduction during laser-jet photolysis: Effect of alcohol solvent on cross-coupling versus hydrogen abstraction of the electronically excited hydroxydiphenylmethyl radical
作者:Waldemar Adam、Barbara Walther
DOI:10.1016/0040-4020(96)00576-5
日期:1996.7
The ground state of the hydroxydiphenylmethyl radical (1) leads to benzpinacol (2) through head-to-head coupling and the diols 3 as cross-coupling product. In contrast. under the high-intensity conditions of the laser-jet photolysis. the excited radical 1∗ couples in the para position to afford the benzophenone derivatives 4 (head-to-tail coupling) (higher spin density at the para position / AM1 calculations)
Synthesis of a Benzophenone C-Nucleoside as Potential Triplet Energy and Charge Donor in Nucleic Acids
作者:Hans-Achim Wagenknecht、Michael Weinberger
DOI:10.1055/s-0031-1289672
日期:2012.2
A synthetic route to the C-nucleoside that bears benzophenone as a DNA base substitution directly at the anomeric center of the 2′-deoxyribofuranoside was worked out. Furthermore, the α-anomer of this artificial nucleoside was converted synthetically into the corresponding DNA building block and incorporated into two representative oligonucleotides by automated phosphoramidite chemistry. The chromophore-modified
Photochemistry and Photophysics of (<i>p</i>-Benzoylphenyl)diphenylmethyl and (<i>p</i>-Benzoylphenyl)bis(4-<i>tert</i>-butylphenyl)methyl Radicals in Different Solvents
作者:Viktor V. Jarikov、Alexandre V. Nikolaitchik、Douglas C. Neckers
DOI:10.1021/jp000227g
日期:2000.6.1
rt-butylphenyl)methyl (2) in various solvents were investigated. The photophysical parameters of the first excited doublet state of the radicals were measured using spectroscopic and kinetic methods and led to a “molecular rotor” model to characterize the excited-state behavior. The charge-transfer excited state for both radicals was observed. Photoproducts separated from the photolysis of 1 and 2