α1-Adrenoceptor Agonists: The Identification of Novel α1A Subtype Selective 2′-Heteroaryl-2-(phenoxymethyl)imidazolines
摘要:
Novel 2'-heteroaryl-2-(phenoxymethyl)imidazolines have been identified as potent agonists of the cloned human alpha(1)-adrenoceptors in vitro. The nature of the 2'-heteroaryl group can have significant effects on the potency, efficacy, and subtype selectivity in this series. alpha(1A) Subtype selective agonists have been identified. (C) 2002 Elsevier Science Ltd. All rights reserved.
Brönsted Acid-Catalyzed One-Pot Synthesis of Indoles from <i>o</i>-Aminobenzyl Alcohols and Furans
作者:Alexey Kuznetsov、Anton Makarov、Aleksandr E. Rubtsov、Alexander V. Butin、Vladimir Gevorgyan
DOI:10.1021/jo402132p
日期:2013.12.6
Brönstedacid-catalyzed one-pot synthesis of indoles from o-aminobenzyl alcohols and furans has been developed. This method operates via the in situ formation of aminobenzylfuran, followed by its recyclization into the indole core. The method proved to be efficient for substrates possessing different functional groups, including −OMe, −CO2Cy, and −Br. The resulting indoles can easily be transformed
N′‐tetramethylethylenediamine) or InCl3 (0.33 equiv) with [Li(tmp)] (tmp=2,2,6,6‐tetramethylpiperidino; 1.5 or 1.3 equiv, respectively) were compared with the previously described mixture of ZnCl2⋅TMEDA (0.5 equiv) and [Li(tmp)] (1.5 equiv) for their ability to deprotonate anisole, benzothiazole, and pyrimidine. [(tmp)3CdLi] proved to be the best base when used in tetrahydrofuran at room temperature, as demonstrated
synthesis of 2-substitutedfurans via palladium- and iron-catalyzed coupling utilizing 2-bromofuran is described. Whereas palladium-catalyzed Suzuki coupling effectively provided the corresponding aryl furans, little or no product was obtained by palladium-catalyzed coupling with various alkyl nucleophiles. Iron-catalyzed coupling proved effective for the synthesis of primary and secondary alkyl furans in modest
Catalytic thienylcarbene-transfer reactions have been developed. The rhodium-catalyzed reaction of alkenes, furans, and thiophenes with a thiocarbamoyl-ene-yne compound as a carbene source gave the cyclopropanation products or ring-opened products of heterocycles. These processes provide efficient synthetic methods for thiophene-containing complex molecules.
A nonionic amphiphile, TPGS-750-M, enables efficient Stille couplings between a wide range of substrates to be conducted in water as the only medium, in most cases at room temperature.