Detail of "3949-36-8"

Reference

Sensitizers for electronic photography

Sensitizers for electronic photography. Kubota, Tomio (Ricoh Co., Ltd., Japan). Japan. JP 51037047 B4 29 Nov 1975 Showa, 5 pp. Division of Japan. Kokai 74 60,212. (Japanese). (Japan). CODEN: JAXXAD. CLASS: IC: C09B057-00. APPLICATION: JP 72-100798 6 Oct 1972. DOCUMENT TYPE: Patent CA Section: 40 (Dyes, Fluorescent Whitening Agents, and Photosensitizers) Section cross-reference(s): 27, 74 The title sensitizers I (R = H, Br, Cl, MeO, R1 = H, NO2) with .lambda.max 450-550 nm and sensitization at 400-750 nm were prepd. For example, 3-acetylcoumarin [3949-36-8] and 2-hydroxy-1-naphthaldehyde [708-06-5] in dichloroethane were treated with HClO4 and satd. with gaseous HCl overnight to give I (R = R1 = H) [53653-31-9]; also prepd. were I (R and R1 given): MeO, H [53653-81-9]; Cl, H [53653-83-1]; H, NO2 [53653-33-1]; Br, H [53653-85-3].Except for chemicals metioned above, 53653-21-7 and 708-06-5 are also used. .

Polarographic behavior of 3-acetylcoumarin

Polarographic behavior of 3-acetylcoumarin. Reddy, B. Obula; Reddy, A. Venkata Rami; Raju, K. Mohana; Rao, A. Kameswara (Dep. Chem., Sri Krishnadevaraya Univ., Anantpur 515 003, India). J. Electrochem. Soc. India, 35(4), 319-20 (English) 1986. CODEN: JESIA5. ISSN: 0013-466X. DOCUMENT TYPE: Journal CA Section: 72 (Electrochemistry) Section cross-reference(s): 22, 27 A 50mM stock soln. of 3-acetylcoumarin was prepd. in DMF and used with Britton-Robinson buffers in the pH range 2-10. The polarograms were run in an H-type cell using a SCE as ref. and a pen recording app. The 3-acetylcoumarin gave 3 waves at pH 2-4, 2 waves at pH 5-8 and a single wave at pH >8. The waves were interpreted and a reaction mechanism suggested. Introduction of an acetyl group at the 3-position of coumarin has little effect on the polarog. 3949-36-8 is just another one chemical used in this study. redn. of the ethylenic bond present in the lactone ring of coumarin. .