A New Carbanionic One-Carbon Ring Enlargement-Alkylation of Lactams
作者:Michela Valacchi、Walter Cabri、Alessandro Mordini、Arnault De Philippis、Gianna Reginato
DOI:10.1055/s-2003-42045
日期:——
The lithium-bromine exchange of bicyclic bromo-substituted γ- and δ-lactams has been investigated finding that the lithium intermediates undergo a ring-enlargement reaction eventually leading to the isomeric six- and seven-membered lactams. Interception of the lithium species with electrophiles allows the synthesis of a series of functionalized quinolinones and benzoazepines.
Radical cyclization of o-iodophenylacrylamides afforded indolin-2-ones in good yields.
将o-碘苯乙烯酰胺进行基团环化反应,得到了良好产率的吲哚-2-酮。
Cobalt-mediated aryl radical cyclisations: A formal synthesis of physovenine
作者:Andrew J. Clark、Keith Jones
DOI:10.1016/s0040-4020(01)89878-1
日期:1992.1
A synthesis of the tetrahydrofuro[2,3-b]indole (3) in 6 steps from 4-methoxyaniline involving a key cobalt-mediated radicalcyclisation is presented. This heterocycle is a known, late intermediate in the synthesis of the alkaloid physovenine (2).
介绍了由4-甲氧基苯胺在6个步骤中合成四氢呋喃并[2,3- b ]吲哚(3)的过程,该过程涉及关键的钴介导的自由基环化。该杂环是生物碱植物蛇毒(2)合成中已知的晚期中间体。
Evidence on the nature of cobalt-mediated aryl radical cyclisations
作者:Andrew J. Clark、Keith Jones
DOI:10.1016/s0040-4039(01)80600-6
日期:1989.1
Regiochemical and stereochemical evidence is presented which indicates that cobalt-mediated aryl radicalcyclisations involve simple free radicals.
提供了区域化学和立体化学证据,表明钴介导的芳基自由基环化涉及简单的自由基。
Drug releasing coatings for medical devices
申请人:Lutonix, Inc.
公开号:US10835719B2
公开(公告)日:2020-11-17
The invention relates to a medical device for delivering a therapeutic agent to a tissue. The medical device has a layer overlying the exterior surface of the medical device. The layer contains a therapeutic agent, an antioxidant, and an additive. In certain embodiments, the additive has a hydrophilic part and a drug affinity part, wherein the drug affinity part is at least one of a hydrophobic part, a part that has an affinity to the therapeutic agent by hydrogen bonding, and a part that has an affinity to the therapeutic agent by van der Waals interactions. In some embodiments, the additive is a liquid. In other embodiments, the additive is at least one of a surfactant and a chemical compound, and the chemical compound has one or more hydroxyl, amino, carbonyl, carboxyl, acid, amide or ester groups.