PATENTS

      149.            BARBRICK, P. L., AND PAVLIC,  A. A. (E. I. du Pont de Nemours & Co.).  Acetals.  United States Patents 2,491,915, Dec. 20, 1949.  Chem. Abs., vol. 44, 1950, p. 3008

Iso-C₄H₈ 28, MeOH 50, finely divided Co 5, and an equimolecular mixture of CO and H₂ heated in a Aglined autoclave for 2 hr. at 135°-140° and 800-1,400 p. s. i., followed by distillation, gave Me₂CHCH₂CH(Ome)₂ B₄₈ 48°-50°, 12 parts; 2.4-dinitrophenylhydrazone, m. 123°-124°.  Similarly, disobutylene 84 yielded a di-Me acetal 80 parts.  C₁₁H₂₄O₂, b₅₀ 109°-111°.  n²⁵_d 1.4181, d²⁵₄.8436: 2.4-dinitrophenylhydrazone, C₂₃H₂₂N₄O₄, m. 92.5°-95.0°.