Nitrogenous Educts through Oxidative Amidation of Phenols: The Bimolecular Reaction
作者:Sylvain Canesi、Denis Bouchu、Marco A. Ciufolini
DOI:10.1021/ol048094v
日期:2005.1.1
[Reaction: see text] The elusive oxidative amidation of phenols to 4-aza-substituted dienones in the bimolecular mode may be achieved by treatment with iodobenzene diacetate ("DIB") in a mixture of hexafluoro-2-propanol and acetonitrile.
Synthetic aspects of the oxidative amidation of phenols
作者:Huan Liang、Marco A. Ciufolini
DOI:10.1016/j.tet.2010.05.020
日期:2010.7
action of hypervalent iodine reagents. The reagent, (diacetoxyiodo)benzene (‘DIB’) is especially effective in these transformations. This paper focuses on techniques for the desymmetrization of the dienoes thus obtained, leading to the stereocontrolled creation of N-substituted spiro carbons. The methodology creates new opportunities in alkaloid synthesis, as apparent from a number of examples.
Leukotriene receptor antagonists. 2. The [[(tetrazol-5-ylaryl)oxy]methyl]acetophenone derivatives
作者:Robert D. Dillard、F. Patrick Carr、Doris McCullough、Klaus D. Haisch、Lynn E. Rinkema、Jerome H. Fleisch
DOI:10.1021/jm00388a028
日期:1987.5
was connected to the second benzene ring in the para position with a chemical bond (67), methylene (68), or ethylene (71). For retention of high antagonist activity, the acetophenone should be substituted in the 2-position by a hydroxyl group and the tetrazole ring should have an acidic hydrogen atom. 1-[2-Hydroxy-3-propyl-4-[[4-(1H-tetrazol-5-ylmethy) phenoxy]methyl]phenyl]ethanone (68, LY1632443) has
合成了一系列[[((四唑-5-基芳基)氧基]甲基]苯乙酮,并作为白三烯D4诱导的豚鼠回肠收缩的拮抗剂进行了评估。在苯乙酮的3-位上用乙基(66),丙基(68),丁基(83)和异丁基(84)取代,得到的-log IC 50值分别为7.9、8.0、7.8和7.7。当四唑-5-基通过化学键(67),亚甲基(68)或乙烯(71)与对位的第二个苯环连接时,会得到同样有效的化合物。为了保持高拮抗剂活性,苯乙酮应在2位上被羟基取代,四唑环应具有酸性氢原子。1- [2-羟基-3-丙基-4-[[4-(1H-四唑-5-基甲基)苯氧基]甲基]苯基]乙酮(68,
Tetrazole derivatives, their production and use
申请人:Takeda Chemical Industries, Ltd.
公开号:US05591862A1
公开(公告)日:1997-01-07
Novel tetrazole derivatives represented by the formula ##STR1## wherein n denotes an integer of 1 to 3; A is an optionally substituted heterocyclic residue; Y is a divalent hydrocarbon residue; and X is CH or N, or pharmaceutically acceptable salts thereof have excellent hypoglycemic and hypolipidemic activities.
Synthetic ventures inspired by biosynthetic hypotheses: the evolution of a method for the oxidative amidation of phenols
作者:Marco A. Ciufolini、Sylvain Canesi、Malika Ousmer、Norbert A. Braun
DOI:10.1016/j.tet.2006.01.111
日期:2006.5
We describe the development of a technique for the oxidative conversion of 4-alkyl phenols to derivatives of the corresponding 4-alkyl-4-amino-2,5-cyclohexanediones. This transformation, which was inspired by biogenetic considerations, constitutes a key step in the total syntheses of FR-901483, TAN-1251C, and cylindricine C. (c) 2006 Elsevier Ltd. All rights reserved.