Pharmacology on rat ileum of certain 2-substituted 3-(dimethylamino)-5,6-dimethoxyindenes related to 5,6-(methylendioxy)indene calcium antagonist
摘要:
Whereas the 2-propyl- and 2-butyl-5,6-(methylenedioxy)indene calcium antagonists reversed the spasmogenic action of several agonists including PGF2alpha and acetylcholine at 5 X 10(-5) to 10(-4) M on the rat ileum, the corresponding 5,6-dimethoxy analogues exhibited spasmogenic activity at higher concentration (10(-4)-10(-3) M) and exhibited neither spasmogenic nor spasmolytic activity at lower (10(-6)-10(-5) M) concentration. The results are compared to the methyl and 2-ethyl analogues. At 10(-4) M only the butyl analogue was capable of moderate antagonism of acetylcholine and at 10(-3) M all four analogues were capable of moderately antagonizing the actions of acetylcholine.
Neutral Ionic Liquid [hmim]Br as a Green Reagent and Solvent for the Mild and Efficient Dehydration of Benzyl Alcohols into (<i>E</i>)-Arylalkenes Under Microwave Irradiation
作者:Rakesh Kumar、Abhishek Sharma、Naina Sharma、Vinod Kumar、Arun K. Sinha
DOI:10.1002/ejoc.200800657
日期:2008.11
A mild and efficient, ionic-liquid-assisted, green protocol for the dehydration of benzyl alcohols into the corresponding (E)-arylalkenes under microwave irradiation has been developed. The method utilizes a neutral and recyclable ionic liquid (1-hexyl-3-methylimidazolium bromide) as a reagent and solvent to cleanly provide a wide range of olefins withoutthe need of harsh and expensive Bronsted/Lewis
Triflimide-catalyzed allylsilane annulations of benzylic alcohols for the divergent synthesis of indanes and tetralins
作者:Jordan C. T. Reddel、Weiwei Wang、Kalli Koukounas、Regan J. Thomson
DOI:10.1039/c6sc04762a
日期:——
development of a triflimide-catalyzed annulation of benzylic alcohols with allylsilanes for the synthesis of indane or tetralin structures is reported. In this fragment coupling reaction, complexity is built rapidly from readily available starting materials to yield diverse sets of products with up to three contiguous stereocenters. Indanes or tetralins can be generated from common precursors depending
PROCESS FOR PREPARATING OPTICALLY ACTIVE COMPOUNDS
申请人:Japan Science and Technology Corporation
公开号:EP0916637A1
公开(公告)日:1999-05-19
The present invention relates to a novel, highly practical method for producing optically active compounds such as optically active alcohol and optically active amine useful for various utilities such as synthetic intermediates of drugs, liquid crystal materials, and optical resolution agents, comprising hydrogen transfer-type asymmetric reduction in the presence of a transition metal catalyst and an optically active nitrogen-containing compound or a transition metal catalyst with an optically active nitrogen-containing compound as the asymmetric ligand, and a hydrogen-donating organic or inorganic compound.
In accordance with the present invention, characteristically, an optically active secondary alcohol can be recovered through the hydrogen transfer-type oxidation from racemic secondary alcohol or meso-type diol.