16900-53-1Relevant articles and documents
Syntheses of α-pyrones using gold-catalyzed coupling reactions
Luo, Tuoping,Dai, Mingji,Zheng, Shao-Liang,Schreiber, Stuart L.
supporting information; experimental part, p. 2834 - 2836 (2011/07/07)
Sequential alkyne activation of terminal alkynes and propiolic acids by gold(I) catalysts yields compounds having α-pyrone skeletons. Novel cascade reactions involving propiolic acids are reported that give rise to α-pyrones with different substitution patterns.
Method of preserving organic materials from fungal attack and a composition for use in such a method
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, (2008/06/13)
A variety of organic materials susceptible to fungal attack (especially wood and wood-based materials) can be protected from such attack and fungi growing on such materials can be eradicated by treating them, e.g. by applying to the surfaces or impregnating, with one or more compounds of formula (I): STR1 (wherein X represents a halogen atom and R represents a hydroxy group, an alkoxy gorup, a substituted or unsubstituted phenoxy group, an amino group, a mono- or di- alkylamino group, a phenylamino or benzylamino group which is unsubstituted or has one or two substituents on the benzene ring of the phenyl or benzyl moiety, or a 3-halo-2,3-diiodoallyloxy group). An anti-fungal composition contains one or more of these compounds in admixture with a carrier or adjuvant.
Ionization Constants of 3-Substituted Propiolic Acids in Water
Laurence, Christian,Guilleme, Jean,Kirschleger, Bernard
, p. 1341 - 1343 (2007/10/02)
The pKa of ten 3-substituted propiolic acids XCCCO2H with X = OPh, Me, Ph, SiMe3, SPh, H, I, Cl, Br, and CO2Et have been measured at 25 deg C in water by a conductance method.The effect of substituents has been compared in the propiolic, acrylic, and benzoic series by means of linear free energy relationships.It is found that the Hammett and the DSP equations are less precisely obeyed in the propiolic series.Significant deviations occur for hydrogen and iodine which confirm the positive character of these groups when bound to an ethynyl group.
SUBSTITUTION DES HALOGENO-1 ALCYNES-1 PAR LES DERIVES ORGANOMETALLIQUES DU CUIVRE. ACCES A UNE NOUVELLE CLASSE DE SYNTHONS: APPLICATION A LA SYNTHESE DU BOMBYKOL
Commercon, A.,Normant, J. F.,Villieras, J.
, p. 1215 - 1222 (2007/10/02)
1-Bromo- and 1-iodo-1-alkynes are alkylated by organocopper(I) compounds.Alkenylcopper(I) derivatives undergo substitution with retention of configuration leading to conjugated and functional enynes, from which conjugated dienes can be obtained.
