Synthesis of chiral pyrrolidine and pyrrole derivatives through the chemoselective Dieckmann reaction of α,β-aminodiesters
摘要:
alpha,beta -Aminodiesters were allowed to react with t-BuOK in THF at -78 degreesC. The chemoselectivity of the Dieckmann cyclization was controlled by the nature of the substituents R-3 and R-4, allowing the preparation of pyrrolidine or pyrrole derivatives. (C) 2000 Elsevier Science Ltd. All rights reserved.
Indium Trichloride-Catalyzed Conjugate Addition of Amines to <i>α</i>,<i>β</i>-Ethylenic Compounds in Water
作者:Teck-Peng Loh、Lin-Li Wei
DOI:10.1055/s-1998-1845
日期:1998.9
Catalytic amount of indium (III) trichloride efficiently catalyzed Michael reaction between amines and α,β-ethylenic compounds in water and under mild conditions. Indium trichloride can be recovered and reused without decrease in yield.
Design, Synthesis, and Biological Evaluation of Thio-Containing Compounds with Serum HDL-Cholesterol-Elevating Properties
作者:Hassan Elokdah、Theodore S. Sulkowski、Magid Abou-Gharbia、John A. Butera、Sie-Yearl Chai、Geraldine R. McFarlane、Mar-Lee McKean、John L. Babiak、Steven J. Adelman、Elaine M. Quinet
DOI:10.1021/jm030219z
日期:2004.1.1
A novel series of substituted sulfanyldihydroimidazolones (1) that modulates high-density lipoprotein cholesterol (HDL-C) has been reported to have HDL-elevating properties in several animal models. Concerns about the chemical and metabolic stability of I directed us to explore the structure-activity relationship (SAR) of a related series of substituted thiohydantoins (2). Expansion of the scope of the thiohydantoin series led to exploration of compounds in related thio-containing ring systems 3-7 and the N-cyanoguanidine derivative 8. Compounds were tested sequentially in three animal models to assess their HDL-C elevating efficacy and safety profiles. Further evaluation of selected compounds in a dose-response paradigm culminated in the identification of compound 2.39 as a candidate compound for advanced preclinical. studies.