Reference

Disazo compound for photoconductor

Disazo compound for photoconductor. (Asahi Glass Co., Ltd.In this study， 88395-59-9 and 86-73-7 are also used., Japan). Jpn. Kokai Tokkyo Koho JP 58177954 A2 18 Oct 1983 Showa, 6 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: IC: C07C107-08; G03G005-06. APPLICATION: JP 82-58001 9 Apr 1982. DOCUMENT TYPE: Patent CA Section: 41 (Dyes, Organic Pigments, Fluorescent Brighteners, and Photographic Sensitizers) Section cross-reference(s): 74 I [88395-56-6], useful in photoconductors in electrophotog., was prepd. Thus, fluorene [86-73-7] and NBS in AcOH were treated with 47% HBr to give 2,7-dibromofluorene [16433-88-8] which was then treated with 4-nitrostyrene [100-13-0] in the presence of Bu3N, Pd acetate, and (o-MeC6H4)3P in DMF at 100° for 3 h and then at 120° for 1 h to give 2,7-bis(4-nitrostyryl)fluorene (II) [88395-60-2]. II was reduced (Fe/HCl) to 2,7-bis(4-aminostyryl)fluorene [88395-59-9] and then tetrazotized to give a tetrazonium di-fluoroborate [88395-58-8]. The tetrazonium salt was coupled with Naphthol AS-MX [92-75-1] to give 49% I, violet crystals. .

Disazo compound for photoconductor

Disazo compound for photoconductor. (Asahi Glass Co., Ltd., Japan). Jpn. Kokai Tokkyo Koho JP 58177955 A2 18 Oct 1983 Showa, 6 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: IC: C07C107-08. ICA: G03G005-06. APPLICATION: JP 82-60409 13 Apr 1982. DOCUMENT TYPE: Patent CA Section: 41 (Dyes, Organic Pigments, Fluorescent Brighteners, and Photographic Sensitizers) Section cross-reference(s): 74 I [88414-22-6], useful in photoconductors in electrophotog., was prepd. Thus, fluorene [86-73-7] and NBS in AcOH were treated with 47% HBr to give 2,7-dibromofluorene [16433-88-8] which was then oxidized (CrO3) in AcOH to give 2,7-dibromofluoren-9-one (II) [14348-75-5]. II was treated with 4-nitrostyrene [100-13-0] in the presence of Bu3N, Pd acetate, and (o-MeC6H4)3P in DMF at 100° for 5 h to give 2,7-bis(4-nitrostyryl)fluoren-9-one [88395-61-3] which was then reduced (Fe/HCl) to 2,7-bis(4-aminostyryl)fluoren-9-one [88395-62-4] and tetrazotized to give a tetrazonium di-fluoroborate. The tetrazonium salt was coupled with Naphthol AS-MX [92-75-1] in DMF to give 61% I.