Industrial process for the synthesis of 2-substituted 1-(hydroxy-ethylidene)-1,1-bisphosfi- conic acids of high purity and the salts thereof
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Nov 3, 2009
Issued Date -
N/A
app pub date -
Jan 27, 2004
filing date -
Jan 28, 2003
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Process for the synthesis of high purity 2-substituted-1-(hydroxy-ethylidene)-1,1-bisphosphonic acid of formula (I), the salts and hydrates thereof—wherein the meaning of R is 3′-pyridyl or 2′-amino-ethylidene group—from compounds of formula (II)—wherein the meaning of R is as described above—or salts and hydrates thereof with phosphorous acid in the presence of methanesulfonic acid using phosphorus pentoxide as reagent and in given case the obtained acid is converted into a salt with base.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully