Na+-dependent high affinity binding of [3H]LY515300, a 3,4-dimethyl-4-(3-hydroxyphenyl)piperidine opioid receptor inverse agonist
摘要:
Analogues of 3,4-dimethyl-4-(3-hydroxyphenyl)piperidines are high affinity inverse agonists for mu-, delta- and kappa-opioid receptors. To characterize inverse agonist binding, we synthesized a high specific activity radioligand from this series, [H-3]LY515300 (3-[1-((3-cyclohexyl-[3,4-(3) H-2])-3 (R,S)-hydroxypropyl)-3 (R),4(R)-dimethylpiperidin-4-yl]phenol). In membranes expressing cloned human opioid receptors, [H-3]LY515300 binding was saturable and exhibited low nonspecific binding. [H-3]LY515300 bound with high affinity to the mu(K-d = 0.07 nM), delta- (K-d = 0.92 nM) and kappa-(K-d = 0.45 nM) opioid receptors. High affinity [H-3]LY515300 binding to all opioid receptors was Na+-dependent, a characteristic of inverse agonists. Displacement by standard opioid compounds yielded K-i values consistent with their known opioid receptor affinities. Autoradiographic localization of specific [H-3]LY515300 binding in rat and guinea pig brain was high in areas known to express high levels of opioid (particularly mu-opioid receptor) binding sites including the caudate, nucleus accumbens, and nucleus tractus solitarius. Thus, [H-3]LY515300 is the first radiolabeled opioid receptor inverse agonist useful for the study of opioid receptors in cell lines and native tissues. (C) 2003 Elsevier B.V. All rights reserved.
A simple synthesis of dienones via isomerization of alkynones effected by palladium catalysts
作者:Barry M. Trost、Thomas. Schmidt
DOI:10.1021/ja00215a051
日期:1988.3
Les alcynones sont preparees a partir d'acides N-methyl O-methyl hydroxamiques et d'alcynes lithies. L'isomerisation de ces alcynones en dienones s'effectue avec une excellente chimioselectivite
Les alcynones sont 制备了一部分 N-甲基 O-甲基异羟肟酸和 d'alcynes lithies。L'异构化 de ces alcynones en dinones s'effectue avec uneexcelle chimioselectivite
Copper-Catalyzed Alkene Arylation with Diaryliodonium Salts
作者:Robert J. Phipps、Lindsay McMurray、Stefanie Ritter、Hung A. Duong、Matthew J. Gaunt
DOI:10.1021/ja3039807
日期:2012.7.4
synthetic organic chemistry. We report a new approach to alkene arylation using diaryliodoniumsalts and Cu catalysis. Using a range of simple alkenes, we have shown that the product outcomes differ significantly from those commonly obtained by the Heck reaction. We have used these insights to develop a number of new tandem and cascade reactions that transform readily available alkenes into complex arylated
A new strategy for accessing (S)-1-(furan-2-yl)pent-4-en-1-ol: a key precursor of Ipomoeassin family of compounds and C1–C15 domain of halichondrins
作者:Subba Rao Jammula、Venkateswara Rao Anna、Sudhakar Tatina、Thalishetti Krishna、B. Yogi Sreenivas、Manojit Pal
DOI:10.1016/j.tetlet.2016.07.059
日期:2016.8
A highly efficient synthesis of (S)-1-(furan-2-yl)pent-4-en-1-ol, known to be an initial precursor of Ipomoeassin family of compounds and C1–C15 domain of halichondrins has been achieved via a sequence involving the use of Weinreb amide formation followed by Weinreb ketone synthesis and finally CBS (Corey–Bakshi–Shibata) reduction. Detailed study on improvement of each step is described. The title
Site‐selective Hydrogenation/Deuteration of Benzylic Olefins Enabled by Electroreduction Using Water
作者:Simon Kolb、Daniel B. Werz
DOI:10.1002/chem.202300849
日期:——
Electroreduction of benzylicolefins has been applied to site-selectively hydrogenate such double bonds while other functions that react under regular hydrogenation conditions are present. By the use of water as proton source this protocol also allows deuteration by simply switching to D2O. The applicability of this method was shown by the use of a commercially available electrolysis setup and a broad
苄基烯烃的电还原已应用于位点选择性氢化此类双键,同时存在在常规氢化条件下反应的其他功能。通过使用水作为质子源,该协议还允许通过简单地切换到 D 2 O 进行氘化。该方法的适用性通过使用商用电解装置和广泛的底物范围得到证明。
TROST, BARRY M.;SCHMIDT, THOMAS, J. AMER. CHEM. SOC., 110,(1988) N 7, 2301-2303