Pii: S0040-4039(99)00696-6

Pii: S0040-4039(99)01563-4

The 9-phenylthioxanthyl (S-pixyl or S-Px) group has been investigated as a photocleavable protecting group for primary alcohols, and specifically as a 5' hydroxy protecting group for deoxyribonucleosides. Several alcohols, including the four nucleosides with protected exocyclic amino functions, were protected in very good to excellent yield by treatment of 9-chloro-9-phenylthioxanthene 3 in dry...

Pii: S0040-4020(99)00950-3

Pii: S0040-4039(01)95460-7

The oxidation of bilindiones has long been used as an analytical tool 1) 293) , but the primary steps of these reactions have been investigated only recently . They became in particular interesting 4) with the proposal, that the conversion of the P lant photomorphogenetic pigment phytochrome from Pr to Pfr may involve oxidativ events 516 . The formal nucleophilic substitution proposed recently ...

Pii: S0040-4039(98)01492-0

A luminescent ruthenium(ll) bipyridyl receptor with pendant boronic acids is synthesized and shown to bind phosphorylated sugars in water. The association constant for fructose-6-phosphate is log K a = 3.1 M "1 at 298 °K. The receptor simultaneously binds saccharide/phosphate with positive cooperativity. © 1998 Elsevier Science Ltd. All rights reserved. Recent designs of anion receptors have in...

Pii: S0040-4039(02)00328-3

Palladium-catalyzed homocoupling reaction of aryl boronic acids has been developed using a protocol similar to the well-documented crosscoupling reaction. -Halocarbonyl compounds are applied to initiate the reaction via oxidative addition to a palladium(0) species. The resulting palladium enolate halide can promote the double transmetallation. Reductive elimination generates the desire homocoup...