β Scribed by Wilson, James W.
No coin nor oath required. For personal study only.
π SIMILAR VOLUMES
The phenoperidine hydrochloride was labelled with l4C at the carboethoxy group, in six steps from diethanolamine. The carbon-14 labelled benzyl cyanide precursor was prepared from Na CN and benzyl chloride 14
## Abstract A number of synthetic approaches are assessed to prepare allantoin labelled with ^14^C given certain requirements and technical limitations. A method that fulfils these criteria is described to achieve the synthesis of highly pure ^14^Cβlabelled allantoin with the label introduced to th
D L -t y r o ~i n e -4 -~~C has been synthesized with an overall yield 29.3 based on phenol-1-14C as the starting material. Anisole-l-14C was prepared by methylation of phenol-1-14C with dimethyl sulfate. The radioactive anisole was then converted to p-anisaldehyde-4-14C by a modijied Gattermann rea
## Abstract The 2βcarbon units, glycine and glyoxylate are combined by a mild reaction via the copper chelate of glycine. The resulting Ξ²βhydroxy aspartic acid is converted to DLβmalic acid by means of hydroxylamine 0βsulfonic acid. The overall yields are in the range of 35β50% in submillimolar pre
A new procedure has been developed for the synthesis of I4C-labeled glutethimide with an improved yield from K14CN. In this procedure benzyl cyanide prepared from benzyl chloride and K14CN was almost quantitatively monoethylated by an ion-pair extraction method using 50% excess of tetrabutylammonium