![Sample our Physical Sciences journals, sign in here to start your FREE access for 14 days]({"type":"image" , "src" : "/sda/110819/TOC-Subject-Sample-2021-Physical-Sciences.jpg"})
Abstract
The reactions of ninhydrin (1, 1,2,3-indantrione) with arenes in the presence of concentrated sulfuric acid afforded mono- or di-substituted ninhydrin derivatives at the 2-position in reasonable yields.
Notes
2,3-Dihydroxy-2,3-diphenyl-1-indanone: mp 175–177 °C; 1H NMR (CDCl3) δ 3.95 (s, 1H), 4.38 (s, 1H), 6.75–8.10 (m, 14H); 13C NMR (CDCl3) δ 82.96, 85.83, 123.92, 126.80, 126.91, 127.16, 127.20, 127.26, 127.42, 127.51, 130.13, 135.68, 136.41, 138.59, 140.14, 155.16, 204.11; Mass (20 eV) m/z (rel intensity) 77 (17), 105 (100), 132 (43), 133 (65), 209 (30), 210 (49), 221 (51), 298 (100), 299 (100), 316 (M+, 8)