以下工作介绍了三种通用方法,这是首次允许合成包含两个相同杂原子(即氧OOC,氮NNC或硫SSC)的5,10-二杂苯并二烯衍生物。所描述的两种途径涉及相应的三烯2的光环化,这是导致七环芳族体系的关键步骤。第三种方法基于茚三酮14与苯并[ b ]杂油15之间的酸性缩合。还介绍了5,10-二杂甲苯烯核的典型官能化。此外,本文讨论了三种建议的途径来接收特定的5,10-二杂间苯二酚衍生物的优点和局限性,因为到目前为止尚不适合用于获得具有任何类型杂原子分子的通用方法。
palladium‐catalyzed intramolecularoxidativeCH/CH cross‐couplingreaction. This reaction provides a variety of π‐conjugated molecules bearing heteroatoms, such as nitrogen, oxygen, phosphorus, and sulfur atoms, and a carbonyl group. The π‐conjugated molecules were synthesized efficiently, even in gram scale, and larger π‐conjugated molecules were also obtained by a double CH/CH cross‐couplingreaction and successive
含杂原子的阶梯型π共轭分子的合成通过钯催化的分子内氧化性下成功地实现了 H / C ħ交叉偶联反应。该反应提供了各种带有杂原子(例如氮,氧,磷和硫原子)和羰基的π共轭分子。π共轭分子有效地合成,即使在克规模,以及较大的π共轭分子也由双C所得 H / C ħ交叉偶联反应和连续氧化cycloaromatization。
Cut and sew: benzofuran-ring-opening enabled cyclopentenone ring formation
A facile approach to the fully substituted cyclopentenones involving an unprecedented benzofuran-ring-opening is described. The cleavage of a benzofuran endocyclic C2–O bond proceeded smoothly in the absence of any transition metal catalyst or highly reactive organometallic reagent. Such benzofuran-ring-opening is delicately incorporated into an acid-catalyzed cascade process, orchestrating a novel
3-iodobenzo[b]furans and stannanyl ester afforded the stereoselective production of 9Z-retinoic acid esteranalogs in good yields. These esters were then converted to the corresponding acids via basic hydrolysis in excellent yields, and their biological activities were evaluated. The analog changed the connected position of polyene side chain from 2-position to 3-position of benzo[b]furan decreased the
Benzofuran derivatives as D.sub.4 receptor antagonists
申请人:Merck, Sharp & Dohme, Ltd.
公开号:US05665722A1
公开(公告)日:1997-09-09
A class of chemical compounds comprising a benzo [b] furan moiety and a substituted heterocyclic moiety, linked via the 3-position of the benzo [b] furan moiety by a methylene group, are antagonists of dopamine receptor subtypes within the brain, being extremely potent antagonists of the human dopamine D.sub.4 subtype over other dopamine receptor subtypes, and are accordingly of benefit in the treatment and/or prevention of psychotic disorders such as schizophrenia while manifesting fewer side-effects than those associated with classical neuroleptic drugs.
Methanesulfonate salts of antipsychotic benzofuran derivatives
申请人:Merck, Sharp & Dohme, Ltd.
公开号:US05681836A1
公开(公告)日:1997-10-28
The methanesulfonate salt of a class of antipsychotic compounds comprising a benzo\x9bb!furan moiety and a substituted heterocyclic moiety, linked via the 3-position of the benzo\x9bb!furan moiety by a methylene group, which are antagonists of dopamine receptor subtypes within the brain, being extremely potent antagonists of the human dopamine D.sub.4 receptor subtype and having a selective affinity for the D.sub.4 subtype over other dopamine receptor subtypes, possess advantageous qualities in terms of their improved aqueous solubility relative to the corresponding free base and, as such, provide for greater ease of formulation and display enhanced pharmacokinetic properties, including oral absorption.