Unexpected Diels–Alder/Carbonyl-ene Cascade toward the Biomimetic Synthesis of Chloropupukeananin

The biomimetic synthesis of the advanced model compound of chloropupukeananin has been achieved. The present synthesis features an unexpected enantiomer-differentiating Diels–Alder/carbonyl-ene cascade under high-pressure conditions and a base-promoted migration of the salicyl group

Unexpected Diels–Alder/Carbonyl-ene Cascade toward the Biomimetic Synthesis of Chloropupukeananin

The biomimetic synthesis of the advanced model compound of chloropupukeananin has been achieved. The present synthesis features an unexpected enantiomer-differentiating Diels–Alder/carbonyl-ene cascade under high-pressure conditions and a base-promoted migration of the salicyl group

Discovery of a Potent Dual Inhibitor of Wild-Type and Mutant Respiratory Syncytial Virus Fusion Proteins

A novel series of macrocyclic pyrazolo­[1,5-a]­pyrimidine derivatives as respiratory syncytial virus (RSV) fusion glycoprotein (F protein) inhibitors were designed and synthesized based on docking studies of acyclic inhibitors. This effort resulted in the discovery of several macrocyclic compounds, such as 12b, 12f, and 12h, with low nanomolar to subnanomolar activities against the wild-type RSV F protein A2. In addition, 12h showed a single-digit nanomolar potency against the previously reported drug-resistant mutant D486N. Molecular modeling and computational analyses suggested that 12h binds to the D486N mutant while maintaining a rigid bioactive conformation via macrocyclization and that it interacts with a hydrophobic cavity of the mutant using a new interaction surface of 12h. This report describes the rational design of macrocyclic compounds with dual inhibitory activities against wild-type and mutant RSV F proteins