Radioiodinated benzamines method of their use as radioimaging agents
First Claim
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1. [123 I](S)-N-[(1-ethyl-2-pyrrolidinylmethyl]-5-iodo-2-methoxybenzamide.
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Abstract
Novel, substituted benzamides in radioiodinated form are useful in radiopharmaceutical compositions in nuclear medicine as imaging agents to detect, visualize, and analyze the distribution and function of the dopamine D-2 receptor in the mammalian brain. The substituted benzamides and their racemic mixtures or their optically resolved enantiomers can be made by reacting a trialyltin substituted benzamide with an acid in the presence of radioactive iodine, generated by in situ oxidation of an appropriate iodide nuclide salt.
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Citations
7 Claims
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1. [123 I](S)-N-[(1-ethyl-2-pyrrolidinylmethyl]-5-iodo-2-methoxybenzamide.
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2. [123 I](R)-N-[(1-4fluorobenzyl-2-pyrrolidinyl)methyl]-5-iodo-2-methoxybenzamide
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3. [123 I](S)-N-[1-ethyl-2-pyrrolidinyl)methyl]-5-chloro-3-iodo-6-methoxysalicylamide.
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4. [123 I](R)-N-[1-(4-fluorobenzyl)-2-pyrrolidinyl)methyl]5-iodo-2,3-dimethoxybenzamide.
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5. [123 I](S)-N-[(1-ethyl-2-pyrrolidinyl)methyl]-5-iodo-2,3-dimethoxybenzamide.
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6. [123 I](S)-N-[(1-ethyl-2-pyrrolidinyl)methyl]-3-iodo-5,6-dimethoxysalicylamide.
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7. A method of radioimaging a human brain comprising the steps of:
(a) systematically applying a radioiodinated substituted benzamine selected from the group consisting of [123 I](S)-N-[(1-ethyl-2-pyrrolidinylmethyl]-5-iodo-2-methoxy-benzamide;
(123 I](R)-N-[1-ethyl-2-pyrrolidinyl)methyl]-5-iodo-2-methoxy-benzamide;
[123 I](S)-5-chloro-N-[1-ethyl-2-pyrrolidinyl)methyl]-3-iodo-6-methoxysalicylamide;
[123 I](R)-N-[(1-(4-fluorophenyl-2-pyrrolidinyl)methyl]-5-iodo-2-methoxybenzamide; and
[123 I](S)-N-[(1-ethyl-2-pyrrolidinyl)methyl]-3-iodo-5,6-dimethoxysalicylamide;
[123 I](R)-N-[(1-ethyl-w-pyrrolidinyl)methyl]-5-iodo-2,3-dimethoxy-benzamide.
Specification