Fragment-Based Approach to the Development of an Orally Bioavailable Lactam Inhibitor of Lipoprotein-Associated Phospholipase A2 (Lp-PLA2)
摘要:
Lp-PLA(2) has been explored as a target for a number of inflammation associated diseases, including cardiovascular disease and dementia. This article describes the discovery of a new fragment derived chemotype that interacts with the active site of Lp-PLA(2). The starting fragment hit was discovered through an X-ray fragment screen and showed no activity in the bioassay (IC50 > 1 mM). The fragment hit was optimized using a variety of structure-based drug design techniques, including virtual screening, fragment merging, and improvement of shape complementarity. A novel series of Lp-PLA(2) inhibitors was generated with low lipophilicity and a promising pharmacokinetic profile.
For the purpose of providing a GSK-3β inhibitor containing a 2-aminopyridine compound or a salt thereof or a prodrug thereof useful as an agent for the prophylaxis or treatment of a GSK-3β-related pathology or disease, the present invention provides a GSK-3β inhibitor containing a compound represented by the formula (IA):
wherein each symbol is as defined in the specification.
or a salt thereof or a prodrug thereof.
Stereospecific Nitrogen Insertion Using Amino Diphenylphosphinates: An Aza-Baeyer–Villiger Rearrangement
作者:Mike Ong、Marlene Arnold、Alexander W. Walz、Johannes M. Wahl
DOI:10.1021/acs.orglett.2c02361
日期:2022.8.26
Amino diphenylphosphinates, which are commercially available or easily prepared from hydroxylamine, undergo ringexpansion of cyclobutanones toward γ-lactams under mild conditions. A reaction pathway profoundly different from the common Beckmann reaction is achieved through the ambivalent character of the aminating agent. Thus, rearrangement occurs from a Criegee-like intermediate prior to the formation
This manuscript describes the synthesis of γ-lactam from the nitrogen insertion reaction of cyclobutanones using an oxime as an aminating reagent with a catalytic amount of Brønstedacid. This method was employed with a more stable oxime reagent, which is a precursor analog of hydroxylamine derivatives with explosive properties. The reaction was tolerated by various substituted cyclobutanones and less