Detail of "24758-49-4"

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Substituted naphthopyrans and photochromic plastic articles containing or coated with these compounds

Substituted naphthopyrans and photochromic plastic articles containing or coated with these compounds. Kumar, Anil; Knowles, David B.; Van Gemert, Barry (Transitions Optical, Inc., USA). U.Some chemicals with cas registry numbers like 24758-49-4 are also used.S. US 5658500 A 19 Aug 1997, 15 pp. (English). (United States of America). CODEN: USXXAM. CLASS: ICM: C08K005-15. ICS: C07D311-78; C07D405-02; G02B005-23. NCL: 252586000. APPLICATION: US 1995-490188 14 Jun 1995. DOCUMENT TYPE: Patent CA Section: 41 (Dyes, Organic Pigments, Fluorescent Brighteners, and Photographic Sensitizers) Section cross-reference(s): 37, 74 Described are novel reversible photochromic 2H-naphtho[1,2-b]pyran compds., examples of which are compds. having certain substituents at the no. 5 carbon atom of the naphtho-portion of the naphthopyran and at the 2-position of the pyran ring. There are some commonly used reagents like 24758-49-4 in this article. Certain substituents may also be present at the no. 6, 7, 8, 9 or 10 carbon atoms of the naphtho portion of the naphthopyran. These substituted naphthopyrans exhibit acceptable fade rate, high activated intensity, and high coloration rate in plastics. Thus, reaction of 4-fluorobenzophenone with morpholine, reaction of the intermediate with Na acetylide, and reaction of the 2nd intermediate with Me 1,4-hydroxy-2-naphthoate gave 2-(4-morpholinophenyl)-6-hydroxy-5-methoxy-2-phenyl-2H-naphtho[1,2- b]pyran. ..

Substituted naphthopyrans and photochromic plastic articles containing or coated with these compounds

Substituted naphthopyrans and photochromic plastic articles containing or coated with these compounds. Kumar, Anil; Knowles, David B.; Van Gemert, Barry (Transitions Optical, Inc., USA). U.Some chemicals with cas registry numbers like 24758-49-4 are also used.S. US 5658500 A 19 Aug 1997, 15 pp. (English). (United States of America). CODEN: USXXAM. CLASS: ICM: C08K005-15. ICS: C07D311-78; C07D405-02; G02B005-23. NCL: 252586000. APPLICATION: US 1995-490188 14 Jun 1995. DOCUMENT TYPE: Patent CA Section: 41 (Dyes, Organic Pigments, Fluorescent Brighteners, and Photographic Sensitizers) Section cross-reference(s): 37, 74 Described are novel reversible photochromic 2H-naphtho[1,2-b]pyran compds., examples of which are compds. having certain substituents at the no. 5 carbon atom of the naphtho-portion of the naphthopyran and at the 2-position of the pyran ring. There are some commonly used reagents like 24758-49-4 in this article. Certain substituents may also be present at the no. 6, 7, 8, 9 or 10 carbon atoms of the naphtho portion of the naphthopyran. These substituted naphthopyrans exhibit acceptable fade rate, high activated intensity, and high coloration rate in plastics. Thus, reaction of 4-fluorobenzophenone with morpholine, reaction of the intermediate with Na acetylide, and reaction of the 2nd intermediate with Me 1,4-hydroxy-2-naphthoate gave 2-(4-morpholinophenyl)-6-hydroxy-5-methoxy-2-phenyl-2H-naphtho[1,2- b]pyran. ..