公开(公告)号：US20230242493A1

公开(公告)日：2023-08-03

申请号：US17766286

申请日：2020-10-20

Applicant: BASF SE

Inventor： Birgit Gockel ,  Volker Maywald ,  Manfred Ehresmann ,  Daniel Saelinger ,  Roland Goetz ,  Jan Haller

IPC: C07D257/04

CPC classification number: C07D257/04

Abstract: Process for making a compound represented by formula (3), comprising the following steps: a) reacting an azide compound with a compound represented by formula (1) to yield compound (2), compound (2) being a compound represented by formula (2) or its salts, b) methylating compound (2) obtained in step a) using a methylating agent to obtain compound (3), wherein R1 denotes a hydrocarbon rest, and wherein in step a) a solvent system A and in step b) a solvent system B is used, wherein both solvent systems A and B comprise one dipolar aprotic solvent or a mixture of dipolar aprotic solvents as the main component, and wherein steps a) and b) are carried without isolating the compound (2) obtained in step a).

公开(公告)号：US20210155595A1

公开(公告)日：2021-05-27

申请号：US17047671

申请日：2019-04-15

Applicant: BASF SE

Inventor： Jan Haller

IPC: C07D257/04 ,  B01J31/02

Abstract: The invention relates to a process for the preparation of 1-(2-methoxymethyl-3-methylphenyl)4H-tetrazolin-5-one, comprising a step of reacting an isocyanate compound with an azide salt in a solvent and in the presence of a silicon derivative as a catalyst.