obtained from inhibitors to activators on GPCRs. Derivatives 2–5, 8, 15, 16 and 18–20 possessed moderate activation potency on GPCRs. Among them, derivatives 3–5, 16 and 19 presented significant activation potency on GPCRs with EC50 values in the range of 1.18–1.91 nM. Derivatives 6, 11, 14 and 18 showed significant inhibitory potency on GPCRs with IC50 values in the range of 1.26-1.38 nM. Moreover,
Reaction of α-Haloketones with<i>ortho</i>-Dihydroxy-2<i>H</i>-1-benzopyran-2-ones. Formation of α-Pyrano-1,5-benzodioxapines-A New Heterocyclic System
作者:Avula Prashant、Gazaula DavidKrupadanam、Roberto R. Gil、Lee-Juian Lin、Geoffrey A. Cordell
DOI:10.1080/00397919608004791
日期:1996.12
Abstract Reaction of 7,8-dihydroxy-2H-1-benzopyran-2-one, and its 4-methyl derivative, with α-haloketones affords α-pyrano-1,5-benzodioxapines, while 3-chloro-4-methyl-7,8-dihydroxy-2H-1-benzopyran-2-one gives α-pyrano-1,4-benzodioxane. The structures of the compounds were deduced using a combination of 1H nmr, 13C nmr (BB, DEPT), HETCOR, NOESY, and selective INEPT techniques and molecular modeling