Reference

Ozonization of triphenylmethane dyes

Ozonization of triphenylmethane dyes. Matsui, Masaki; Nakabayashi, Hideki; Shibata, Katsuyoshi; Takase, Yoshimi (Fac. Eng., Gifu Univ., Gifu 501-11, Japan). Bull. Chem. Soc. Jpn., 57(11), 3312-16 (English) 1984. CODEN: BCSJA8. ISSN: 0009-2673. DOCUMENT TYPE: Journal CA Section: 41 (Dyes, Organic Pigments, Fluorescent Brighteners, and Photographic Sensitizers) Section cross-reference(s): 60 The reaction of O3 with Malachite Green oxalate (I) [2437-29-8], a model triphenylmethane dye, proceeded via two paths. The first path involved an O3 attack at the MeN moiety to give a N-formylmethylamino deriv. The 2nd path produced 4-(dimethylamino)benzophenone and p-(dimethylamino)phenol. 4-(Formylmethylamino)benzophenone and the N,N'-diformyl deriv. of I were also detected. The mechanism of the ozonization is discussed.

Novel pre-dyes

Novel pre-dyes. Nohr, Ronald Sinclair; Macdonald, John Gavin (Kimberly-Clark Corporation, USA). PCT Int. Appl. WO 9639646 A1 12 Dec 1996, 78 pp. DESIGNATED STATES: W: AL, AM, AT, AU, AZ, BB, BG, BR, BY, CA, CH, CN, CZ, DE, DK, EE, ES, FI, GB, GE, HU, IL, IS, JP, KE, KG, KP, KR, KZ, LK, LR, LS, LT, LU, LV, MD, MG, MK, MN, MW, MX, NO, NZ, PL, PT, RO, RU, SD, SE, SG; RW: AT, BE, BF, BJ, CF, CG, CH, CI, CM, DE, DK, ES, FI, FR, GA, GB, GR, IE, IT, LU, MC, NL, PT, SE. (English). (World Intellectual Property Organization). CODEN: PIXXD2. CLASS: ICM: G03C001-73. APPLICATION: WO 1996-US8887 5 Jun 1996. PRIORITY: US 1995-463187 5 Jun 1995; US 1996-649754 29 May 1996. DOCUMENT TYPE: Patent CA Section: 74 (Radiation Chemistry, Photochemistry, and Photographic and Other Reprographic Processes) Section cross-reference(s): 41 One embodiment of the present invention is a method and compn. comprising a novel pre-dye mol. that is colorless and stable to ordinary light. The pre-dye mol. is capable of forming a color when exposed to certain wavelengths of electromagnetic radiation. A second embodiment of the present invention is a method of converting a conventional leuco dye to a colored compn. by exposing the leuco dye admixed with a radiation transorber to certain wavelengths of electromagnetic radiation.Except for chemicals metioned above, 181214-89-1 and 2437-29-8 are also used. .