IP Library Granted Patent US 12,552,822
Granted Patent B2
US 12,552,822 · App. 18/064,947 · Granted Feb 17, 2026

Pt-xanthene-bromine complex

Inventors: Carolin Schneider (Monheim am Rhein, DE); Ralf Jackstell (Rostock, DE); Matthias Beller (Ostseebad Nienhagen, DE); Robert Franke (Marl, DE)
Assignee: EVONIK OXENO GMBH & CO. KG
C07F15/0086
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Quick Facts
Patent No.
US 12,552,822
App. No.
18/064,947
Granted
Feb 17, 2026
Kind
B2
Abstract

Pt-xanthene-bromine complex, and use thereof for catalysis of a hydroformylation reaction.

Claims (22)

1 . Complex comprising:

a) Pt;

b) a ligand conforming to the formula (I):

where R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 are selected from: —H, —(C 1 -C 12 )-alkyl, —(C 6 -C 20 )-aryl;

and, if R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 are —(C 6 -C 20 )-aryl, the aryl ring may have substituents selected from: —(C 1 -C 12 )-alkyl, —O—(C 1 -C 12 )-alkyl;

c) a bromine ligand.

2 . Complex according to claim 1 ,

where R 2 , R 3 , R 5 , R 6 , R 7 , R 8 are selected from: —(C 1 -C 12 )-alkyl, —(C 6 -C 20 )-aryl.

3 . Complex according to claim 1 , where R 5 , R 6 , R 7 , R 8 are —(C 6 -C 20 )-aryl.

4 . Complex according to claim 1 , where R 2 and R 3 are —(C 1 -C 12 )-alkyl.

5 . Complex according to claim 1 , where R 1 and R 4 are —H.

6 . Complex according to claim 1 ,

wherein the ligand conforming to the formula (I) has the structure (1):

7 . Complex according to claim 1 ,

wherein the complex has exactly one ligand conforming to the formula (I).

8 . Complex according to claim 1 ,

wherein the complex has at least two bromine ligands.

9 . Complex according to claim 1 ,

wherein the complex has exactly two bromine ligands.

10 . Complex according to claim 1 ,

wherein the complex has the following structure: Pt(Xantphos)Br 2 .

11 . In a process for hydroformylation comprising contacting a hydroformylation substrate with a catalyst wherein the improvement comprises contacting the complex according to claim 1 with the hydroformylation substrate for catalysis of the hydroformylation.

Assignments (2)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 9, 2024
From: EVONIK OPERATIONS GMBH
To: EVONIK OXENO GMBH & CO. KG
Reel/Frame 066242/0585 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 24, 2023
From: SCHNEIDER, CAROLIN; JACKSTELL, RALF; BELLER, MATTHIAS; FRANKE, ROBERT
To: EVONIK OPERATIONS GMBH
Reel/Frame 062470/0765 →
Priority Claims (1)
EP 21215353 · Dec 17, 2021 · regional
Continuity (1)
Related Publication 20230192740A1 · Jun 22, 2023
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