Electrophilic Fluorinating Reagent Mediated Synthesis of Fluorinated α-Keto Ethers, Benzil, and 6,6‘-Dialkoxy-2,2‘-bipyridines
作者:Sudha Manandhar、Rajendra P. Singh、Gary V. Eggers、Jean'ne M. Shreeve
DOI:10.1021/jo0258554
日期:2002.9.1
regioselectively, in excellent isolated yields. On the other hand, fluorinated alcohols did not react with MEC-31. Reaction of MEC-31 with an excess of diethylene glycol (7) gave the bipyridine derivative (8) in 88% isolated yield. Reaction of 8 either with diethylaminosulfurtrifluoride (DAST) or bis(2-methoxyethyl)aminosulfur trifluoride (Deoxofluor) readily produced the corresponding difluoro derivative
Kinetics and Mechanism of Phosphate Photorelease from Benzoin Diethyl Phosphate: Evidence for Adiabatic Fission to an α-Keto Cation in the Triplet State
作者:Cheruvallil S. Rajesh、Richard S. Givens、Jakob Wirz
DOI:10.1021/ja993070i
日期:2000.2.1
The photodissociation of benzoin diethyl phosphate (1, “caged” phosphate) was studied by nanosecond and picosecond laser flash photolysis. The lowest triplet state of 1, 31, was identified as the reactiveexcitedstate with an absorption maximum around 340 nm and a lifetime of 10−25 ns, depending on the solvent. Two different reaction paths were identified, both of which involve the release of diethyl