Fluoride-ion-initiated reactions of acetylenes

Reactions of Fluoride Ion with Hydroxyapatite by Harold

A problem of long standing in the study of dentin and enamel is the exact nature and structure of the inorganic material in these tissues. A review of these studies from the time of Berzelius in 1845 up to 1949 has been published by Armstrong (1). In general the mineral component of teeth as well as bones consists chiefly of a basic calcium phosphate which is most probably hydroxyapatite (2, 3)...

Reactions of Fluoride Ion with Hydroxyapatite by Harold G. Mccann

A problem of long standing in the study of dentin and enamel is the exact nature and structure of the inorganic material in these tissues. A review of these studies from the time of Berzelius in 1845 up to 1949 has been published by Armstrong (1). In general the mineral component of teeth as well as bones consists chiefly of a basic calcium phosphate which is most probably hydroxyapatite (2, 3)...

Solvent-Free Multicomponent Reactions of Dithiocarbamates, Activated Acetylenes and Isocyanides

An efficient method to synthesis the 2H-pyrans using three component reactions of dithiocarbamats, activated acetylenes and isocyanides in water as the solvent is described. In these reactions, synthesis of 2H-pyrans is possible based on the one-pot reaction and without using any catalyst. The mild reaction conditions and high yields of the products exhibit synthetic advantage of these methods.

solvent-free multicomponent reactions of dithiocarbamates, activated acetylenes and isocyanides

Multiphase extraction: rapid phase-transfer of [18F]fluoride ion for nucleophilic radiolabeling reactions.

In multiphase extraction [18F]fluoride ion for radiolabeling is recovered from target water by passage through a small column of microporous polymer impregnated with a lipophilic cryptand or quaternary ammonium salt. The 18O enriched water can be recovered for reuse. The [18F]fluoride ion-pair is eluted from the column by a small volume of acetonitrile or other organic solvent. Evaporation of t...