A Practical Synthesis of 2-Aroylindoles from N-(2-Formylphenyl)trifluoroacetamides in PEG-400
作者:Jiancun Zhang、Yu Zhao、Deyao Li、Liwen Zhao
DOI:10.1055/s-0030-1258445
日期:2011.3
to the synthesis of highly functionalized 3-unsubstituted 2-aroylindoles is described. Moderate to good yields were obtained through the reaction of easily accessible N-(2-formylphenyl)trifluoroacetamides and α-bromoacetophenones in the presence of K2CO3. PEG-400 was found to be an efficient and reusable solvent in the process. 2-aroylindoles - PEG-400 - N-(2-formylphenyl)trifluoroacetamides - heterocycles
描述了一种一锅法且对环境无害的方法,用于合成高度官能化的3-未取代的2-芳酰基吲哚。在K 2 CO 3存在下,通过容易获得的N-(2-甲酰基苯基)三氟乙酰胺与α-溴乙酰苯的反应,可得到中等至良好的收率。发现PEG-400是该过程中有效且可重复使用的溶剂。 2-芳基吲哚-PEG-400- N-(2-甲酰基苯基)三氟乙酰胺-杂环-环化
Discovery of Highly Selective and Nanomolar Carbamate-Based Butyrylcholinesterase Inhibitors by Rational Investigation into Their Inhibition Mode
作者:Edgar Sawatzky、Sarah Wehle、Beata Kling、Jan Wendrich、Gerhard Bringmann、Christoph A. Sotriffer、Jörg Heilmann、Michael Decker
DOI:10.1021/acs.jmedchem.5b01674
日期:2016.3.10
cognitive decline in Alzheimer’s disease. A set of pseudo-irreversible BChE inhibitors with high selectivity over hAChE was synthesized based on carbamates attached to tetrahydroquinazoline scaffolds with the 2-thiophenyl compound 2p as the most potent inhibitor of eqBChE (KC = 14.3 nM) and also of hBChE (KC = 19.7 nM). The inhibitors transfer the carbamate moiety onto the active site under release of the
α-Hydroxydimethylacetal/ketal as an α-hydroxycarbonyl equivalent in interrupted Heyns/Amadori rearrangement: regioselective synthesis of substituted C2- and C3-acylindoles
作者:Minakshi Altia、Pazhamalai Anbarasan
DOI:10.1039/d4nj00771a
日期:——
intramolecular trapping of the aminoenol intermediate derived from o-acyl/formylanilines and α-hydroxydimethylacetals/ketals followed by rearrangement/aromatization in the presence of acid. Important features include the use of α-hydroxydimethylacetal/ketal as an α-hydroxycarbonyl equivalent, excellent regiocontrol, good functional group tolerance, selectivesynthesis of acylindoles, gram-scale synthesis, and
Wet unsupported and supported 1,1'-binaphthalene-2,2'-diamine (BINAM) derived prolinamides are efficient organocatalysts under solvent-free conditions at room temperature to perform the synthesis of chiral tacrine analogues in good yields (up to 93%) and excellent enantioselectivies (up to 96%). The Friedlander reaction involved in this process takes place with several cyclohexanone derivatives and 2-aminoaromatic aldehydes, and it is compatible with the presence of either electron-withdrawing or electron-donating groups at the aromatic ring of the 2-aminoaryl aldehyde derivatives used as electrophiles. The reaction can be extended to cyclopentanone derivatives, affording a regioisomeric but separable mixture of products. The use of the wet silica gel supported organocatalyst, under solvent-free conditions, for this process led to the expected product (up to 87% enantiomeric excess), with its reuse being possible at least up to five times.