Regiospecific introduction of carbon-3 formyl group to 2,5-dialkyl-7-methoxy-benzo[b] furans : Synthesis of potential ligands for adenosine A1 receptors
摘要:
Based on the structure of 1,3-dipropyl-8-cyclopentylxanthine (CPX), the most potent adenosine A1-selective antagonist known today, two derivatives of the novel adenosine A1 receptor ligand 5-(3-hydroxpropyl)-7-methoxy-2-3'-methoxy-4'-hydroxyphenyl)-benzo[b]furan-3-carbaldehyde have been synthesized by utilizing as key steps the regiospecific introduction of a formyl group to of 2-cyclopentyl-and 2-(cyclopent-1'-en-1'-yl)-5-(3-hydroxypropyl)-7-methoxy-benzo[b]furans.
Naturally occurring benzofuran: isolation, structure elucidation and total synthesis of 5-(3-hydroxypropyl)-7-methoxy-2-(3′-methoxy-4′-hydroxyphenyl)-3-benzo[b]furancarbaldehyde, a novel adenosine A1 receptor ligand isolated from salvia miltiorrhiza bunge (danshen)
作者:Zhen Yang、Po Ming Hon、Kuk Ying Chui、Zun Le Xu、Hson Mou Chang、Chi Ming Lee、Yu Xin Cui、Henry N.C. Wong、Chi Duen Poon、Bing M. Fung
DOI:10.1016/s0040-4039(00)78908-8
日期:1991.4
A naturallyoccurring benzofuran, namely 5-(3-hydroxypropyl)-7-methoxy-2-(3′-methoxy-4′-hydroxyphenyl)-3-benzo[b]furancarbaldehyde was isolated from the roots of S. miltiorrhiza Bunge “Danshen”. Its structure was established by means of spectroscopic methods as well as by a total synthesis. Both the natural and the synthetic compounds showed a high potency (IC50 = 17 nM and 10 nM, respectively) in