Method of production and method of separation of 2,4'-dipyridyl derivatives and methods of production of benzoxazepine derivatives and salts thereof
申请人:——
公开号:US20030125547A1
公开(公告)日:2003-07-03
A method of production of 2,4′-dipyridyl derivatives by a cross coupling reaction of a 2-halopyridine derivative and a 4-halopyridine using a nickel complex catalyst and a method of separation of a 2,4′-dipyridyl derivative from a mixture of dipyridyl isomers containing a 2,2′-dipyridyl derivative, 2,4′-dipyridyl derivative, and 4,4′-dipyridyl by using a dilute aqueous copper sulfate solution to insolubilize and remove the 2,2′-dipyridyl derivative and 4,4′-dipyridyl are disclosed.
Method of production and method of separation of 2,4'-dipyridyl
申请人:Suntory Limited
公开号:US06096884A1
公开(公告)日:2000-08-01
A method of production of 2,4'-dipyridyl derivatives by a cross coupling reaction of a 2-halopyridine derivative and a 4-halopyridine using a nickel complex catalyst and a method of separation of a 2,4'-dipyridyl derivative from a mixture of dipyridyl isomers containing a 2,2'-dipyridyl derivative, 2,4'-dipyridyl derivative, and 4,4'-dipyridyl by using a dilute aqueous copper sulfate solution to insolubilize and remove the 2,2'-dipyridyl derivative and 4,4'-dipyridyl are disclosed.
Method of production and method of separation of 2,4′-dipyridyl derivatives and methods of production of benzoxazepine derivatives and salts thereof
申请人:Daiichi Suntory Pharma Co., Ltd.
公开号:US06624308B2
公开(公告)日:2003-09-23
A method of production of 2,4′-dipyridyl derivatives by a cross coupling reaction of a 2-halopyridine derivative and a 4-halopyridine using a nickel complex catalyst and a method of separation of a 2,4′-dipyridyl derivative from a mixture of dipyridyl isomers containing a 2,2′-dipyridyl derivative, 2,4′-dipyridyl derivative, and 4,4′-dipyridyl by using a dilute aqueous copper sulfate solution to insolubilize and remove the 2,2′-dipyridyl derivative and 4,4′-dipyridyl are disclosed.