The Synthesis of Phenanthrene-9-C14 (1,2)

The synthesis of 3,4-benzpyrene-5-C14 and of 2-acetylaminofluorene-9-C14.

comparison of catalytic activity of heteropoly compounds in the synthesis of bis(indolyl)alkanes.

heteropoly acids (hpa) and their salts have advantages as catalysts which make them both economically and environmentally attractive, strong br?nsted acidity, exhibiting fast reversible multi-electron redox transformations under rather mild conditions, very high solubility in polar solvents, fairly high thermal stability in the solid states, and efficient oxidizing ability, so that they are imp...

The synthesis of 17-(methyl-C14)-testosterone and 21-C14-progesterone.

The use of steroid hormones containing tagged atoms promises to have an important part in the study of their metabolism. The relative availability of radioactive Cl4 manufactured in the uranium chain-reacting pile at Oak Ridge has facilitated the synthesis of such compounds containing labeled carbon atoms (1). Through the cooperation of Dr. Konrad Dobriner of the Sloan-Kettering Institute for C...

The synthesis of C14-lipids in rabbit atheromatous lesions.

Studies of the accumulation of phospholipids in the aortic intima of cholesterol-fed rabbits have been reported previously from this laboratory (l-4). After P3z-phosphate injection, it was found that the phospholipid specific activity was higher in aortic intima than in plasma, and that this difference in specific activity was accentuated in eviscerated animals. Although this study gave evidenc...

Synthesis of D-Glucose-1-C14 and D-Mannose-1-C14

Heretofore, radiochemical yields of sugars position-labeled with carbon-14 have been only 5 to 10 percent. This paper reports an improved cyanohydrin synthesis, and the preparation of D-glucose-1-C and D-mannose-1-C from D-arabinose in yields of about 50 percent. Low yields in prior syntheses appear to have been due to several inefficient steps, and to the fact that extension of the carbon chai...