Process for the Preparation of Ethyl-N-(2,3-Dichloro-6-Nitrobenzyl)Glycine Hydrochloride
申请人:Pathi Srinivas Laxminarayan
公开号:US20100075999A1
公开(公告)日:2010-03-25
The invention relates to a process for the preparation of anagrelide, and for the preparation of intermediates for use in preparing anagrelide. The invention also relates to the intermediates per se, in particular compounds of Formula (V):
where R constitutes a suitable leaving group, which may not be hydrogen. The R group may be selected from: (i) —SiR
1
3
, (ii) —CH
2
Ar, (iii) —COOR
2
, and (iv) sulfonates such as —SO
2
R
3
.
Process for the preparation of ethyl-n-(2,3 dichloro-6-nitrobenzyl) glycine
申请人:ROBERTS LABORATORIES INC.
公开号:EP0778258A2
公开(公告)日:1997-06-11
The known blood platelet reducing agent Anagrelide is prepared via an improved process starting with commercially available 2,3-dichlorotoluene and involving novel intermediates represented by the formulas:
wherein Y is Br, Cl or I.
Compound (G) is reacted with ethyl glycine to form the well-known intermediate ethyl-N-(2,3-dichloro-6-nitro benzyl) glycine which is then used following conventional process steps to form Anagrelide.
Process for the preparation of imidazoquinazolinone derivatives
申请人:ROBERTS LABORATORIES INC.
公开号:EP0994114A2
公开(公告)日:2000-04-19
The known blood platelet reducing agent Anagrelide is prepared via an improved process starting with commercially available 2,3-dichliorotoluene and involving novel intermediates represented by the formulas:
wherein Y is Br, Cl or I.
Compound (G) is reacted with ethyl glycine to form the well-known intermediate ethyl-N-(2,3-dichloro-6-nitro benzyl) glycine which is then used following conventional process steps to form Anagrelide.