Abstract
A highly efficient and optimized synthesis of sodium[1-14C] lauryl sulphate having high specific activity (50 mCi/mmol) is described. Lauric acid was converted to undecyl bromide using a modified Hunsdiecker reaction. This was treated with potassium 14C cyanide (specific activity 50 mCi/mmol) using phase transfer catalysis to yield [1-14C]lauronitrile, which was subsequently hydrolysed with a mixture of concentrated hydrochloric acid:propionic acid (1:2 v/v) under microwave irradiation for 2 min to obtain [1-14C] lauric acid in quantitative yield. The latter on reaction with chlorosulphonic acid and subsequent neutralization with sodium bicarbonate yielded the title compound. Copyright © 2005 John Wiley & Sons, Ltd.
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