| Title:  Sorbinil CAS Registry Number:  68367-52-2 CAS Name:  (4¢S)-6-Fluoro-2,3-dihydrospiro[4H-1-benzopyran-4,4¢-imidazolidine]-2¢,5¢-dione Additional Names:  (+)-(4S)-6-fluorospiro[chroman-4,4¢-imidazolidine]-2¢,5¢-dione Manufacturers' Codes:  CP-45634 Molecular Formula:  C11H9FN2O3 Molecular Weight:  236.20 Percent Composition:  C 55.93%, H 3.84%, F 8.04%, N 11.86%, O 20.32% Literature References:  Spirohydantoin aldose reductase inhibitor.  Prepn of racemate and resolution of isomers:  R. Sarges, DE 2821966; idem, US 4130714 (both 1978 to Pfizer).  Synthesis:  R. Sarges et al., J. Org. Chem. 47, 4081 (1982); N. L. Dirlam et al., J. Org. Chem. 52, 3587 (1987).  Absolute configuration:  R. Sarges et al., J. Med. Chem. 28, 1716 (1985).  Effect on polyol accumulation in diabetic rats:  M. J. Peterson et al., Metabolism 28, Suppl. 1, 456 (1979).  Pharmacokinetics in humans:  G. Foulds et al., Clin. Pharmacol. Ther. 30, 693 (1981).  HPLC determn in human lens and plasma:  P. Lloyd, M. J. C. Crabbe, J. Chromatogr. 343, 402 (1985).  Preliminary clinical trials in diabetic neuropathy:  R. J. Young et al., Diabetes 32, 938 (1983); J. Jaspan et al., Lancet 2, 758 (1983).  Symposium on pharmacology and clinical efficacy:  Metabolism 35, Suppl 1, 1-121 (1986). Properties:  Crystals from ethanol, mp 241-243°.  [a]D25 +54.0° (c = 1 in methanol). Melting point:  mp 241-243° Optical Rotation:  [a]D25 +54.0° (c = 1 in methanol)  |