期刊
MOLECULES
卷 28, 期 19, 页码 -出版社
MDPI
DOI: 10.3390/molecules28196800
关键词
isoxazole; lateral metalation; metabotropic glutamate receptor
Isoxazolo[3,4-d] pyridazinones ([3,4-d]s) were found to selectively positively modulate metabotropic glutamate receptor (mGluR) Subtypes 2 and 4, with no cross-reactivity at mGluR1a, mGluR5, or mGluR8. Additional analogs were prepared to increase binding affinity, resulting in successful selective lateral metalation and electrophilic quenching at the C3 position.
Isoxazolo[3,4-d] pyridazinones ([3,4-d]s) were previously shown to have selective positive modulation at the metabotropic glutamate receptor (mGluR) Subtypes 2 and 4, with no functional cross-reactivity at mGluR1a, mGluR5, or mGluR8. Additional analogs were prepared to access more of the allosteric pocket and achieve higher binding affinity, as suggested by homology modeling. Two different sets of analogs were generated. One uses the fully formed [3,4-d] with an N6-aryl with and without halogens. These underwent successful selective lateral metalation and electrophilic quenching (LM&EQ) at the C3 of the isoxazole. In a second set of analogs, a phenyl group was introduced at the C4 position of the [3,4-d] ring via a condensation of 4-phenylacetyl-3-ethoxcarbonyl-5-methyl isoxazole with the corresponding hydrazine to generate the 3,4-ds 2b and 2j to 2n.
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