Claims
- 1. The catalyst comprising rhodium complexed with:
- (a) a ligand of the formula ##STR4## useful as a ligand in hydroformylation and other reactions, wherein n is 1-4;
- each R is independently selected from hydrogen, alkyl, alkoxy, aryloxy, aryl, aralkyl, alkaryl, alkoxyalkyl, cycloaliphatic, halogen, alkanoyl, alkanoyloxy, alkoxycarbonyl, carboxyl or cyano;
- each R.sub.1 and R.sub.2 is independently selected from alkyl, aryl, aralkyl, alkaryl or cycloaliphatic;
- each R.sub.3 and R.sub.4 is independently selected from hydrogen and the R.sub.1 substituents;
- each Y is independently selected from the elements N, P, As, Sb and Bi; and
- each alkyl group or moiety is straight or branched chain of 1-20 carbons, each aryl group contains 6-10 ring carbons, and each cycloaliphatic group contains from 4-6 ring carbons.
- in a molar ratio of ligand/Rh of about 1/1; (b) H in a molar ratio of H/Rh of about 1/1; and (c) carbon monoxide in a molar ratio of CO/Rh of about 2/1.
- 2. The catalyst according to claim 1 wherein the ligand is selected from: 2,2'-bis(diphenylphosphinomethyl)-1,1'-biphenyl; 2,2'-bis-(dibenzylphosphinomethyl)-1,1'-biphenyl; 2,2'-bis(phenylbenzylphosphinomethyl)-1,1'-biphenyl; 2,2'-bis(diisobutylphosphinomethyl)-1,1'-biphenyl; and mixtures thereof.
Parent Case Info
This is a divisional of application Ser. No. 60,693 filed on June 11, 1987, U.S. Pat. No. 4,851,581, which is a divisional of application Ser. No. 873,918 filed on June 13, 1986, U.S. Pat. No. 4,694,109.
US Referenced Citations (4)
Number |
Name |
Date |
Kind |
3798241 |
Kagan et al. |
Mar 1974 |
|
3949000 |
Aviron Violet |
Apr 1976 |
|
4201714 |
Hughes |
May 1980 |
|
4306087 |
Matsumoto et al. |
Dec 1981 |
|
Non-Patent Literature Citations (4)
Entry |
Electrochemical Reduction of Di-Schiff Bases., Synthesis of Piperazines, Indoloindoles, Diazepines, and Diazocines. |
Koch et al., J. Org. Chem., 47:4452-4459, (1982). |
Chemical Abstracts, (1982), Malmberg et al., vol. 96:104430. |
Chemical Abstracts, (1986), Andersson et al., vol. 106:32467. |
Divisions (2)
|
Number |
Date |
Country |
Parent |
60693 |
Jun 1987 |
|
Parent |
873918 |
Jun 1986 |
|