Detail of "13242-55-2"

Reference

Composition of organic substances of black kraft liquor

Composition of organic substances of black kraft liquor. Shirokova, M. N.Several substances are used for example 503-66-2 and 13242-55-2 which are their cas registry numbers.; Kostina, S. P.; Smetanina, S. S. (Leningr. Lesotekh. Akad., Leningrad, USSR). Khim. Pererab. Drev., 60-3. Edited by: Kiprianov, A. I. Leningr. Lesotekh. Akad.: Leningrad, USSR. (Russian) 1983. CODEN: 51GHAL. DOCUMENT TYPE: Conference CA Section: 43 (Cellulose, Lignin, Paper, and Other Wood Products) Section cross-reference(s): 80 The compn. of black kraft liquor was detd. by acetylation and gas chromatog. The main components of the black kraft liquor were 2-methylol-1,2,4,5-pentanetetrol pentaacetate [89965-01-5] (48.25%), 1,2,5-pentanetriol triacetate [5470-86-0] (15.34%), and 1,3-propanediol diacetate [628-66-0] (14.10%). The most abundant hydroxy acid in black kraft liquor was 2-methylol-2,4,5-trihydroxypentanoic acid [66702-03-2]. .

Configurational effects on carbon-13 chemical shifts of 1,6-anhydrohexopyranoses and related compounds

Configurational effects on carbon-13 chemical shifts of 1,6-anhydrohexopyranoses and related compounds. Utility of carbon-13-proton coupling patterns for signal assignments. Ritchie, R. George S.In this study， 13242-55-2 and 13242-48-3 are also used.; Cyr, Natsuko; Perlin, Arthur S. (Dep. Chem., McGill Univ., Montreal, Que., Can.). Can. J. Chem., 54(14), 2301-9 (English) 1976. CODEN: CJCHAG. DOCUMENT TYPE: Journal CA Section: 33 (Carbohydrates) Section cross-reference(s): 22 An anal. of configurational effects on the 13C chem. shifts of bicyclic compds. of the 1,6-anhydrohexopyranose and 2,7-anhydroheptulopyranose type showed strong upfield shifts in assocn. with an axial orientation of the substituents, although 13C nuclei of the anhydro ring appear to exhibit atypical behavior. Deshielding changes characterize a syn-diaxial orientation of hydroxyl groups, and also of a hydroxyl group with respect to the bridgehead bonds. No appreciable effects of antiperiplanar hydroxyl groups on 13C chem. shifts were detected. Characteristics of one-, two-, and three-bond 13C-1H coupling are of value for the assignment of 13C signals. The 1H-coupled signal for methylenic C-6 of 1,6-anhydrides is commonly non-first order, in contrast to the simpler pattern exhibited by methylenic C-1 of 2,7-anhydrides. .