1-Thia-4,7-diaza-spiro[4.4]nonane-3,6-dione: A Structural Motif for 5-hydroxytryptamine 6 Receptor Antagonism
摘要:
A series of potent 5‐hydroxytryptamine 6 (5‐HT6) receptor antagonists based on 1‐thia‐4,7‐diaza‐spiro[4.4]nonane‐3,6‐dione motif has been disclosed. Enantiomers of potent racemate compound 8a (Ki = 26 nm) displayed difference in activity (Ki of 15 nm versus 855 nm) signaling the influence of the stereochemistry of the chiral center on potency. In addition, the potent enantiomer displayed significant selectivity in biological activities over several related family members.
Efficient, one-pot transformation of indoles into functionalized oxindole and spirooxindole systems under Swern conditions
作者:Pilar López-Alvarado、Judith Steinhoff、Sonia Miranda、Carmen Avendaño、J. Carlos Menéndez
DOI:10.1016/j.tet.2008.12.029
日期:2009.2
and oxalyl chloride under Swern conditions led to a one-pot, three-component process involving three different synthetic transformations, namely oxidation of indole to oxindole, introduction of a chlorine substituent at the oxindole C-3 position and substitution of the hydroxyl group in the side chain by chlorine, in good to excellent overall yields. The same conditions, applied to a 2-methylindole, afforded