Silphos as an efficient heterogeneous reagent for the synthesis of 2-azetidinones
作者:Maaroof Zarei、Aliasghar Jarrahpour
DOI:10.1515/hc-2014-0177
日期:2014.12.1
Abstract
This report provides a description of an efficient and simple procedure for the synthesis of 2-azetidinones via a one-pot reaction of imines and carboxylic acids in the presence of silicaphosphine at room temperature. The reagent is cheap and stable. The yields are good to excellent, and the reaction conditions are mild.
2-Azetidinone Cholesterol Absorption Inhibitors: Structure−Activity Relationships on the Heterocyclic Nucleus
作者:John W. Clader、Duane A. Burnett、Mary Ann Caplen、Martin S. Domalski、Sundeep Dugar、Wayne Vaccaro、Rosy Sher、Margaret E. Browne、Hongrong Zhao、Robert E. Burrier、Brian Salisbury、Harry R. Davis
DOI:10.1021/jm960405n
日期:1996.1.1
A series of azetidinone cholesterol absorption inhibitors related to SCH 48461 ((-)-6) has been prepared, and compounds were evaluated for their ability to inhibit hepatic cholesteryl ester formation in a cholesterol-fed hamster model. Although originally designed as acyl CoA: cholesterol acyltransferase (ACAT) inhibitors, comparison of in vivo potency with in vitro activity in a microsomal ACAT assay indicates no correlation between activity in these two models. The molecular mechanism by which these compounds inhibit cholesterol absorption is unknown. Despite this limitation, examination of the in vivo activity of a range of compounds has revealed clear structure-activity relationships consistent with a well-defined molecular target. The details of these structure-activity relationships and their implications on the nature of the putative pharmacophore are discussed.
Perricone,S.C. et al., Journal of Heterocyclic Chemistry, 1970, vol. 7, p. 135 - 138
作者:Perricone,S.C. et al.
DOI:——
日期:——
Trifluoroethanol Promoted Castagnoli–Cushman Cycloadditions of Imines with Homophthalic Anhydride
作者:Thibault Bayles、Catherine Guillou
DOI:10.3390/molecules27030844
日期:——
medicinal chemistry and key intermediates in the synthesis of natural products. The Castagnoli–Cushman reaction (CCR) of homophthalic anhydride with imines is an exciting method for accessing cyclic densely substituted lactam products. Most CCRs need to be catalyzed or heated. Herein, we report a new, efficient, metal and catalyst-free CCR for the synthesis of poly-substituted 3,4-lactams utilizing the