Detail of "498-23-7"

Reference

Antifungal properties of esters of alkenoic and alkynoic acids

Antifungal properties of esters of alkenoic and alkynoic acids. Huhtanen, C.Some chemicals with cas registry numbers like 624-49-7 and 1515-80-6 are also used. N.; Guy, E. J. (East. Reg. Res. Cent., ARS, Philadelphia, PA 19118, USA). J. Food Sci., 49(1), 281, 283 (English) 1984. CODEN: JFDSAZ. ISSN: 0022-1147. DOCUMENT TYPE: Journal CA Section: 17 (Food and Feed Chemistry) The antifungal properties of the gas phases of a no. of alkenoic and alkynoic acids and esters was investigated by placing the compds. in desiccators contg. suspended bread. The following compds. inhibited mold development at 20 mg/2.6-L desiccator: dimethyl fumarate [624-49-7], diethyl fumarate [623-91-6], propenoic acid [79-10-7], methyl [96-33-3], and ethyl propenoate [140-88-5], methyl [922-67-8] and ethyl propiolate [623-47-2], methyl-2,4-hexadienoate [1515-80-6], 2,4-hexadien-1-ol [111-28-4], diethylethylidene malonate [1462-12-0], 4-penten-1-ol [821-09-0], and 2-cyclohexen-1-one [930-68-7]. Other compds. were active at 200 mg/desiccator: 3-methallyl alc. [513-42-8], allyl acetone [109-49-9], diallyl ether [557-40-4], propiolic acid [471-25-0], methyl [18707-60-3], ethyl [10544-63-5], and vinyl crotonate [14861-06-4]; ethyl-2,4-hexadienoate [2396-84-1]; methyl [2396-77-2] and ethyl 2-hexenoate [1552-67-6]; ethyl 3-hexenoate [2396-83-0]; 1,5-hexadien-3-ol [924-41-4]; methylmaleic acid [498-23-7]; methylmalonic acid [516-05-2]; and 1-penten-3-ol [616-25-1]. .

A fast atom bombardment and field ionization/field desorption study of some isomeric unsaturated dicarboxylic acids

A fast atom bombardment and field ionization/field desorption study of some isomeric unsaturated dicarboxylic acids. Dallinga, J. W.; Nibbering, N. M. M.; Van der Greef, J.; Ten Noever de Brauw, M. C. (Lab. Org.Some commonly used reagents like 498-23-7 and 110-17-8 are used in this experiment. Chem., Univ. Amsterdam, Amsterdam 1018 WS, Neth.). Org. Mass Spectrom., 19(1), 10-15 (English) 1984. CODEN: ORMSBG. ISSN: 0030-493X. DOCUMENT TYPE: Journal CA Section: 22 (Physical Organic Chemistry) The fast-atom-bombardment, field-ionization, and field-desorption mass spectra of (E)- and (Z)-HO2CCH:CRCO2H (R = H, Me), HO2CC(:CH2)CH2CO2H, (E)-HO2CCH:CHCH2CO2H, and 1,2-, 1,3-, and 1,4-C6H4(CO2H)2 were recorded. The most intense peak in the pos. ion fast-atom-bombardment spectra corresponds with the [M + H]+ ion. This ion, when derived from the (E)-acids, fragments either by successive loss of H2O and CO or by elimination of CO2. In the case of the (Z)-acids only elimination of H2O from the [M + H]+ ions is obsd. to occur to a significant extent. Similarly, the [M + H]+ ions derived from iso- and terephthalic acid exhibit more fragmentation than those of phthalic acid. All these acids undergo much less fragmentation upon field ionization, where not only abundant [M + H]+ ions, but also abundant [M]·+ ions, are obsd. Upon field desorption only the [M + H]+ and [M + Na]+ ions are obsd. Neg. ion fast-atom-bombardment spectra were also recorded. In addn. to the most abundant [M - H]- ions relatively intense peaks are obsd., which correspond with the [M]·- ions. .