Syntheses with stable isotopes: Synthesis of deuterium and<sup>13</sup>C labeled bile acids
作者:D. L. Hachey、P. A. Szczepanik、O. W. Berngruber、P. D. Klein
DOI:10.1002/jlcr.2590090412
日期:1973.10
A series of 5β-cholanic acids labeled with deuterium in the A ring were prepared by exchange labeling of the corresponding ketone by column chromatography on deuterated alumina. Factors affecting yield and labeling efficiency are discussed. 5β-Cholanic acids labeled with 13C in the carboxyl position were prepared by treatment of the corresponding 23-chloro-24-norcholane with sodium cyanide-13C followed by alkaline hydrolysis of the nitrile. The intermediates in the synthesis were characterized by high resolution NMR spectroscopy. Mass spectra are also reported for the 13C labeled products.