2-Tert-butylanthraquinone

FIGURE 7-21. Example of use of gradient to solve the general resolution problem. (1) jS-Quinone. (2) 1,4-Naphthaquinone. (3) Anthraquinone. (4) 2-Methyl anthraquinone. (5) 2-Ethyl anthraquinone. (6) 2-Tert-butylanthraquinone. (a) Isocratic separation. Column Bondapak Cig/Corasil, 2.3 mm ID x 122 cm. Mobile phase methanol/water (50/50 v/v). Pressure 1200 psig. (b) First gradient attempt. Column same as in a. Mobile phase 0-100% methanol in water, (c) Successful gradient separation. Column same as in a. Mobile phase 30-70% methanol in water. 

Benjamin, E.J. Conley, D.L. On-line HPLC method for clean-up and analysis of hydrocortisone and sulconazole nitrate in a cream. Int.J.Pharm., 1983, 13, 205—217 Gandelman, M.S. Birks, J.W. Liquid chromatographic detection of cardiac glycosides, saccharides and hydrocortisone based on the photoreduction of 2-tert-butylanthraquinone. Anal.Chim.Acta, 1983, 155, 159-171... 

Hydroxypropyl methacrylate/methy1 aerylate/methy1 methacrylate terpolymers and phthalic acid/trimethylol-propane copolymers were grafted with IBM by Rosenkranz et al. (22,23). These polymers, when formulated with 2-tert-butylanthraquinone, are irradiated with UV light to give insoluble coatings useful in the manufacture of printed circuits and relief printing plates. 

Silica gel or alumina was used as catalyst for the Diels-Alder reaction of 3,4-di-ferf-butylthiophene 1-oxide with 1,4-benzoquinone to produce 6,7-di-terf-butyl-1,4-naphthoquinone 36 and bis-adduct 2,3,6,7-tetra-tert-butylanthraquinone 37 [40]. The silica gel (alumina)-catalyzed enohzation of 38 to form 39 may play an important role in the formation of 36 (Scheme 26). 

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