| US 7,560,600 B2 | ||
| Process for the preparation of a tetraalkylcyclobutane-1,3-diol using a promoted nickel-based catalyst | ||
| Jennifer Ellen McCusker-Orth, Kingsport, Tenn. (US); and Michael Wayne Salyer, Kingsport, Tenn. (US) | ||
| Assigned to Eastman Chemical Company, Kingsport, Tenn. (US) | ||
| Filed on Nov. 30, 2007, as Appl. No. 11/947,981. | ||
| Claims priority of provisional application 60/872319, filed on Dec. 02, 2006. | ||
| Prior Publication US 2008/0132738 A1, Jun. 05, 2008 | ||
| Int. Cl. C07C 35/04 (2006.01); C07C 31/18 (2006.01); C07C 29/143 (2006.01) | ||
| U.S. Cl. 568—839 [568/852; 568/862] | 24 Claims |
1. A process for producing a 2,2,4,4-tetraalkylcyclobutane-1,3-diol of Formula II, comprising contacting a 2,2,4,4-tetraalkylcyclobutane-1,3-dione
with hydrogen in the presence of a promoted nickel-based catalyst under conditions of temperature and pressure sufficient
to form a 2,2,4,4-tetraalkylcyclobutane-1,3-diol,
 wherein each of the alkyl radicals R1, R2, R3 and R4 has, independently from each other, 1 to 8 carbon atoms and wherein less than 2 mol % of the 2,2,4,4-tetraalkylcyclobutane-1,
3-dione is converted to ring-open products and wherein the promoted nickel-based catalyst comprises a promoter metal chosen
from a Group 4 metal.
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