@article { ISI:000240439900043,
	title = {Selective hydrogenation of naphthols to tetralones over supported palladium catalysts in supercritical carbon dioxide solvent},
	journal = {Chemistry Letters},
	volume = {35},
	number = {7},
	year = {2006},
	month = {JUL},
	pages = {780-781},
	publisher = {CHEMICAL SOC JAPAN},
	type = {Article},
	address = {1-5 KANDA-SURUGADAI CHIYODA-KU, TOKYO, 101-8307, JAPAN},
	abstract = {<p>Naphthols were selectively hydrogenated to the corresponding tetralones over supported palladium metal catalysts in super-critical carbon dioxide solvent.</p>},
	issn = {0366-7022},
	doi = {10.1246/cl.2006.780},
	author = {Mine, Eiichi and Hiyoshi, Norihito and Sato, Osamu and Rode, Chandrashekhar V. and Shirai, Masayuki}
}
@article { ISI:000251217800008,
	title = {Stereoselective hydrogenation of tert-butylphenols over charcoal-supported rhodium catalyst in supercritical carbon dioxide solvent},
	journal = {Journal of Catalysis},
	volume = {252},
	number = {1},
	year = {2007},
	month = {NOV},
	pages = {57-68},
	publisher = {ACADEMIC PRESS INC ELSEVIER SCIENCE},
	type = {Article},
	address = {525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA},
	abstract = {<p>Hydrogenation of 2-, 3-, and 4-tert-butylphenols was studied over a charcoal- supported rhodium catalyst in supercritical carbon dioxide (scCO(2)) solvent, and the results were compared with those in organic solvents. In the hydrogenation of 4-tert-butylphenol, a higher cis ratio for 4-tert-butylcyclohexanol (0.79) was obtained in scCO(2) (10 MPa) than in 2-propanol (0.70) and cyclohexane (0.64) under similar conditions of hydrogen pressure (2 MPa) and temperature (313 K). In the case of 2-tert-butylphenol, the cis ratio for 2-tert-butylcyclohexanol was as high as 0.95 in both scCO(2) and 2-propanol (hydrogen pressure, 2 MPa; reaction temperature, 313 K). In the case of hydrogenation of 3-tert-butylphenol, the cis ratio decreased with the progression of consecutive hydrogenation of 3-tert-butylcyclohexanone intermediate. In addition, the stereoselectivity to cis-tert-butylcyclohexanols in scCO(2) was improved in the presence of hydrochloric acid. It was found that the protons of hydrochloric acid accelerated the hydrogenation of the intermediates, tert-butylcyclohexanones, to the corresponding cis-tert-butylcyclohexanols. The hydrogenation mechanism of tert-butylphenols, particularly the enhanced selectivity to cis-tert-butylcyclohexanols in scCO(2), is postulated based on the observed reaction profiles. (c) 2007 Elsevier Inc. All rights reserved.</p>},
	keywords = {charcoal-supported rhodium catalyst, stereoselective hydrogenation, supercritical carbon dioxide solvent, tert-butylcyclohexanol},
	issn = {0021-9517},
	doi = {10.1016/j.jcat.2007.08.01},
	author = {Hiyoshi, Norihito and Rode, Chandrashekhar V. and Sato, Osamu and Tetsuka, Hiroyuki and Shirai, Masayuki}
}
