The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 24, 2005
Filed:
Mar. 28, 2003
Applicants:
Lech Andrzej Ciszewski, Morristown, NJ (US);
Liladhar M. Waykole, Succasunna, NJ (US);
Inventors:
Lech Andrzej Ciszewski, Morristown, NJ (US);
Liladhar M. Waykole, Succasunna, NJ (US);
Assignee:
Novartis AG, Basel, CH;
Primary Examiner:
Int. Cl.
CPC ...
C07D473/16 ; C07D473/40 ;
U.S. Cl.
CPC ...
Abstract
A one-pot process for preparing 2,6-diaminopurine derivatives or an acid addition salt thereof comprising: (i) reacting a purine compound with an amine compound in the presence of a tertiary amine at a pH of 7 to 14 to form a 6-substituted aminopurine derivative, and (ii) reacting the 6-substituted aminopurine with an aromatic amine in the presence of an acid catalyst at a pH of 0.1 to less than 7.