Reference

Indentification of the phosphorescent species in nylon 66

Indentification of the phosphorescent species in nylon 66. Allen, N. S.; McKellar, J. F.; Wilson, D. (Dep. Chem. Appl. Chem., Univ. Salford, Salford/Lancashire, Engl.). J. Polym. Sci., Polym. Chem. Ed., 15(11), 2793-5 (English) 1977. CODEN: JPLCAT. DOCUMENT TYPE: Journal CA Section: 35 (Synthetic High Polymers) The identity of the unsatd. carbonyl species responsible for the phosphorescence of nylon 66 [32131-17-2] was partially detd. by use of the excitation spectrum and the emission spectrum of the model amide N,N'-dibutyladipamide (I) [10472-27-2]. The zone-refined thermally oxidized I had an excitation spectrum with a distinct max. at 273 nm with rather weak and diffuse structure above 300 nm and a highly structured emission spectrum with wavelength max. at 417, 448.5, and 485 nm. When these spectra were compared with those of typical enones and dienones, a better match was found with 2,6-dimethylhept-2,5-dien-4-one [504-20-1] than with pent-3-en-2-one [625-33-2].

Preparation of 4-heterocyclylthio-2-alkanones as flavoring agents

Preparation of 4-heterocyclylthio-2-alkanones as flavoring agents. Emberger, Roland; Guentert, Matthias; Hopp, Rudolf; Koepsel, Manfred; Kuhn, Walter; Werkhoff, Peter (Haarmann and Reimer G.m.b.H., Germany). Ger.Some commonly used reagents like 134281-01-9 and 625-33-2 are used in this experiment. Offen. DE 4016536 A1 28 Nov 1991, 4 pp. (Germany). CODEN: GWXXBX. CLASS: ICM: C07D307-64. ICS: C07D307-18; C07D333-34. APPLICATION: DE 90-4016536 23 May 1990. DOCUMENT TYPE: Patent CA Section: 27 (Heterocyclic Compounds (One Hetero Atom)) Section cross-reference(s): 17 Title compds. (I; R1 = H, alkyl; X = O, S; dotted lines = optional bonds) were prepd. Thus, 2-methylfuran-3-thiol was condensed with MeCH:CHCOMe to give title compd. II which gave a meaty roast beef flavor at 1.5 ppm in a soln. formulation. .