Organic compounds -- part of the class 532-570 series – Organic compounds – Oxygen containing
Patent
1994-12-16
1996-12-17
Dentz, Bernard
Organic compounds -- part of the class 532-570 series
Organic compounds
Oxygen containing
549416, 549475, C07C 43307
Patent
active
055855253
ABSTRACT:
The present invention is for a process for preparing monoacetals of hydroquinone wherein said process provides for higher yields of greater purity. Said process utilizes a two step reaction wherein a protected hydroquinone is reacted with an enol ether to form a protected intermediate. Upon hydrogenolysis of said intermediate a final product, monoacetal hydroquinone, is formed having higher degree of purity and in greater yields that the yields attributed to reactions known in the art.
REFERENCES:
Krishnamurty et al., "Cleavage of Aryl Benzyl Ethers by Heteogeneous Catalytic Transfer Hydrogenation", Indian Journal of Chemistry, Sec. B, vol. 25B, pp. 1253-1254, 1986.
Hanessian et al., "Facile Cleavage of Benzyl Ethers by Catalytic Transfer Hydrogenation", Synthesis, No. 5, pp. 396-397, May 1981.
Lam et al., "The Syntheses of Phenolic Antioxidants. 1,3,5-Tris(4-Hydroxyphenoxymethyl) Mesitylene and Related Compounds", Organic Preparations and Procedures Int., vol. 14(4), pp. 241-247 (1982).
Lam et al. "The Syntheses of Phenolic Antioxidants. 3,5-Bis(3,5-Di-Tert-Butyl-4-Hydroxybenzyl)-2,3,6-Trimethylbenzyl Derivatives" Organic Preparations and Procedures Int., vol. 14(5), pp. 309-317 (1982).
Bieg and Szeja, "Removal of O-Benzyl Protective Groups by Catalytic Transfer Hydrogenation", Communications, Jan., 1985.
Bieg and Szeja, "Cleavage of 2-Phenyl-1,3-dioxolanes and Benzyl Ethers by Catalytic Transfer Hydrogenation", Communications, Apr., 1986.
Banik et al. "Microwave-Induced Organic Reaction Enhancement Chemistry. 4 Convenient Synthesis of Enantiopure .alpha.-Hydroxy-.beta.-Lactams", Tetrahedron Letters, vol. 33, No. 25, pp. 3603-3606 (1992).
Carter John D.
Parsons Jack L.
Starks David F.
Dentz Bernard
Henderson Loretta J.
Howell John M.
Suter David L.
The Procter & Gamble & Company
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