3-Arylindolizines were prepared by one-pot domino reactions from benzyl halides with pyridine (or isoquinoline) and cyclic or acyclic dihalide-substituted electron-deficient alkenes in the presence of potassium carbonate via in situ generated N-ylide intermediate. Both electron-donating and electron-withdrawing groups are tolerated in the aryl ring of benzyl halides. The yields range from moderate to high.
COMPOSITIONS COMPRISING ENZYME-CLEAVABLE OPIOID PRODRUGS AND INHIBITORS THEREOF
申请人:Jenkins Thomas E.
公开号:US20110262355A1
公开(公告)日:2011-10-27
Pharmaceutical compositions and their methods of use are provided, where the pharmaceutical compositions comprise an opioid prodrug that provides enzymatically-controlled release of an opioid, and an enzyme inhibitor that interacts with the enzyme(s) that mediates the enzymatically-controlled release of the opioid from the opioid prodrug so as to attenuate enzymatic cleavage of the opioid prodrug.
COMPOSITIONS COMPRISING ENZYME-CLEAVABLE PRODRUGS OF ACTIVE AGENTS AND INHIBITORS THEREOF
申请人:Jenkins Thomas E.
公开号:US20110262359A1
公开(公告)日:2011-10-27
The present disclosure provides pharmaceutical compositions, and their methods of use, where the pharmaceutical compositions comprise a prodrug that provides enzymatically-controlled release of a drug and an enzyme inhibitor that interacts with the enzyme(s) that mediates the enzymatically-controlled release of the drug from the prodrug so as to attenuate enzymatic cleavage of the prodrug. The disclosure provides pharmaceutical compositions which comprise an enzyme inhibitor and a prodrug that contains an enzyme-cleavable moiety that, when cleaved, facilitates release of the drug.
A safe, convenient, and regioselective synthesis of 3-halo coumarins using a metal halide (CuX2 alone or with ZnX2) promoted halogenation with N-halosuccinimide (NXS) as halide source is reported. The synthesis involved the steady in situ generation of highly reactive positive halogen (X+) by the coordination of copper or zinc with the N-halosuccinimide and subsequent electrophilic aromatic substitution
of biologically valuable benzo[c]chromen-6-ones is achieved using a tandem photo-thermal-photo reaction sequence starting from 3,4-dichlorocoumarins and a 1,3-butadiene. In this concise one-pot protocol, neither metal catalyst nor peroxide promoter is needed and the products can be purified through simple recrystallization in most cases. The synthesis consists of a reaction sequence of photo-induced
使用从3,4-二氯香豆素和1,3-丁二烯开始的串联光热反应过程,可以有效,简单,通用地合成具有生物学价值的苯并[ c ] chromen-6-one。在这种简洁的一锅法方案中,不需要金属催化剂或过氧化物促进剂,并且在大多数情况下,可以通过简单的重结晶来纯化产物。合成过程包括光诱导的[4 + 2]和[2 + 2]环加成反应的顺序,硅胶促进的HCl消除和电环环丁烯开环,然后进行光诱导的6π电环化。用一系列二氯香豆素和一些典型的丁二烯可以很好地进行反应,从而以70-80%的产率提供相应的环状产物。