High yield [125I]iodide-labeling of iodinated carboranes by palladium-catalyzed isotopic exchange
摘要:
We have recently shown the feasibility of palladium-catalyzed isotopic exchange between [I-125]iodide and 2-iodo-para-carborane. In this work we have modified the methodology and extended its application to a wider range of iodinated carboranes. Thus, by using Herrmann's catalyst in toluene at 100 degreesC, 2-I-p-, 3-I-o-, 9-I-o-, 9-I-m-carborane, 1-phenyl-3-I-o-carborane and 1,2-diphenyl-3-I-o-carborane have been radiolabeled with (125)iodine in high to excellent yields. (C) 2003 Elsevier Science B.V. All rights reserved.