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Adamantyl hydantoin compound
WO 2013081100 A1
Riku Gouzu, Takeshi Miyata

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Preparation of adamantyl hydantoin compounds. Gouzu, Riku; Miyata, Takeshi. (Sekisui Medical Co., Ltd., Japan). PCT Int. Appl. (2013), 26pp. CODEN:PIXXD2 WO 2013081100 A1 20130606 Designated States W: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SC, SD, SE, SG, SK, SL, SM, ST. Designated States RW: AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IS, IT, LU, MC, MT, NL, NO, PT, SE, SM, TR, BF, BJ, CF, CG, CI, CM, GA, ML, MR, NE, SN, TD, TG. Patent written in Japanese. Application: WO 2012-JP81066 20121130. Priority: JP 2011-261820 20111130. CAN 159:59200 AN 2013:882776 CAPLUS

ABSTRACT Adamantylhydantoin compds. I [R1 = H or OH] were prepd. from 1-hydroxyadamantane and hydantoin. Compds. I were further hydrolyzed to adamantyl glycine compds. II. For example, to a mixt. of hydantoin (65.74 g) and H2SO4 (98%, 740 g) was added 1-hydroxyadamantane (100 g) and stirred at 70 ° for 3 h to give adamantyl hydantoin (I, R = H) (117.30 g). A mixt. of adamantyl hydantoin (I, R = H) (50 g), aq. NaOH (20%, 256.09 g) and H2O (750 mL) was stirred at 150° for 7 h to provide adamantyl glycine (II, R = H) (34.79 g).