Process for the preparation of novel stabilized phosphorus ylides
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jan 5, 1999
Issued Date -
N/A
app pub date -
Aug 18, 1997
filing date -
May 2, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The present invention relates to novel stabilized phosphorous ylides and processes for their preparation. More particularly, the present invention relates to a process for substituting the carbonyl oxygen of 2-formyl- or 2-oxoalkylidenetriphenyl-phosphoranes (OATP) by other stabilizing groups to form novel compounds having an increased tendency to form complexes or compounds which absorb in the visible region of the spectrum. The compounds according to the present invention are Compounds of the formula (1) Ph.sub.3 .dbd.CH--C(R).dbd.Nu (1) wherein R is hydrogen, a C.sub.1 -C.sub.5 -alkyl, C.sub.1 -C.sub.3 -fluoroalkyl or perfluoroalkyl radical, an unfluorinated or fluorinated C.sub.6 -C.sub.14 -aryl radical or a group OCH.sub.3 ; and Nu is S, Se, C(CN).sub.2, NH, PhN, PhNHN, ##STR1## or a radical of the formulae (a), (b), (c), (d) or (e) ##STR2## wherein Z is C(CH.sub.3).sub.2, S or N(CH.sub.3) and n=1 or 2 (provided that the combinations R.dbd.Ar, SAlk or OAlk and Nu.dbd.NPh, and the combinations R.dbd.H, Alk or aryl and Nu.dbd.S are excluded) are disclosed, as well as methods for making them.
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