Synthesis, Pharmacological Characterization, and Quantitative Structure−Activity Relationship Analyses of 3,7,9,9-Tetraalkylbispidines: Derivatives with Specific Bradycardic Activity
摘要:
A series of 3,7,9,9-tetraalkyl-3,7-diazabicyclo[3.3.1]nonane derivatives (bispidines) was synthesized and identified as potential antiischemic agents. Pharmacological experiments in vitro as well as in vivo are described, and the results are listed. For selection of those compounds fitting best to the desired profile of a specific bradycardic antianginal agent-decrease in heart rate without affecting contractility and blood pressure-these results were scored and ranked. Quantitative structure-activity relationship (QSAR) analyses were performed and discussed a posteriori by means of Hansch, nonelementary discriminant and factor analysis to get insight into the molecular features determining the biological profile. Highly significant equations were obtained, indicating hydrophobic and steric effects. Both pharmacological ranking and QSAR considerations showed compound 6 as the optimum within the structural class under investigation. Compound 6 (tedisamil, KC8857) has been selected as the most promising compound and was chosen for further pharmacological and clinical investigations as an antiischemic drug.
Synthesis of 4-Substituted 3,5-Dicyano-2,6-piperidinediones Using Lithium Nitride as a Convenient Source of Ammonia
作者:Li qiang Wu、Chunguang Yang、Liming Yang、Lijuan Yang
DOI:10.3987/com-08-11584
日期:——
A simple and efficient one-pot synthesis of 4-substituted-3,5-dicyano-2,6-piperidinediones was achieved in good yields via the three-component reaction of aldehyde or ketone, ethyl cyanoacetate, lithium nitride (Li 3 N) as a convenientsource of ammonia in MeOH.
通过醛或酮、氰基乙酸乙酯、氮化锂 (Li 3 N) 的三组分反应,以良好的收率实现了简单高效的一锅法合成 4-取代-3,5-二氰基-2,6-哌啶二酮作为 MeOH 中氨的方便来源。
Chemical and electrocatalytic cascade cyclization of Guareschi imides: ‘one-pot’ simple and efficient way to the 2,4-dioxo-3-azabicyclo[3.1.0]hexane scaffold
作者:Anatoly N. Vereshchagin、Michail N. Elinson、Evgeniya O. Dorofeeva、Dmitry V. Demchuk、Ivan S. Bushmarinov、Alexander S. Goloveshkin、Gennady I. Nikishin
DOI:10.1016/j.tet.2013.04.035
日期:2013.6
as mediator results in fast and efficient cyclization with formation of a substituted 3-azabicyclo[3.1.0]hexane system in 80–98%. The fast (30 min) electrocatalytic reaction proceeds smoothly under neutral and mild conditions. The use of electrocatalysis in a cascade cyclization reaction is an efficientapproach to the medicinallyrelevant 3-azabicyclo[3.1.0]hexane scaffold avoiding the inconvenient