US 7,321,035 B2
Process for producing 2,6-dihalogenopurine
Naruhito Masai, Osaka (Japan); Taketo Hayashi, Osaka (Japan); Hiroharu Kumazawa, Osaka (Japan); Junichi Nishikawa, Osaka (Japan); Istvan Barta, Paty (Hungary); and Takehiko Kawakami, Osaka (Japan)
Assigned to Sumitomo Chemical Company, Limited, Osaka (Japan)
Filed on Nov. 19, 2004, as Appl. No. 10/991,505.
Application 10/991505 is a division of application No. 10/296234, granted, now 6,936,713, previously published as PCT/JP02/03325, filed on Apr. 03, 2002.
Claims priority of application No. 2001-107004 (JP), filed on Apr. 05, 2001.
Prior Publication US 2005/0090666 A1, Apr. 28, 2005
Int. Cl. C07D 473/40 (2006.01)
U.S. Cl. 544—277 16 Claims
 
1. A process for preparing a 9-acetyl-2-amino-6-halogenopurine, comprising treating a 2-amino-6-halogenopurine with an acetylating agent in the presence of a base.