On January 13, 2022, Barrett, Matthew; Cockerill, George Stuart; Good, James; Avery, Craig Alex; Cochrane, Edward James; Jones, Stefan Paul; Onions, Stuart Thomas; Warner, Andrew Joseph published a patent.Recommanded Product: Ethyl 6,7-dihydro-5H-pyrazolo[5,1-b][1,3]oxazine-2-carboxylate The title of the patent was Synthesis of Benzodiazepines useful in treating a respiratory syncytial virus infection. And the patent contained the following:
The synthesis of benzodiazepines, I, wherein: one of R1 or R2 can be II such that the other group is selected from H, cycloalkyl, halo, amino, benzyl, Ph, 4- to 10-membered heterocyclic or heteroaryl groups; R3 can be H or halo; and the ring A can be a 5- or 6-membered heterocyclic ring system containing a variety of N, O or C atoms are prepared as pharmaceutically acceptable salt RSV inhibitors used to treat or prevent an RSV infection. Of note, II was synthesized and displayed an RSV A2 plaque EC50 of 33 nM and cell cytotoxicity of greater than 25,000 nM CC50 and presented in aqueous formulations. Further, some I derivatives were tested in vitro pharmacokinetics to investigate liver microsomal stability. The experimental process involved the reaction of Ethyl 6,7-dihydro-5H-pyrazolo[5,1-b][1,3]oxazine-2-carboxylate(cas: 153597-59-2).Recommanded Product: Ethyl 6,7-dihydro-5H-pyrazolo[5,1-b][1,3]oxazine-2-carboxylate
The Article related to benzodiazepine preparation antiviral rsv infection, Heterocyclic Compounds (More Than One Hetero Atom): Diazepines and other aspects.Recommanded Product: Ethyl 6,7-dihydro-5H-pyrazolo[5,1-b][1,3]oxazine-2-carboxylate
Referemce:
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics