ZrCl<sub>4</sub>-Catalyzed Michael Reaction of 1,3-Dicarbonyls and Enones under Solvent-Free Conditions
作者:Ch. Reddy、G. Smitha、Sujatha Patnaik
DOI:10.1055/s-2005-861837
日期:——
ZrCl4 has been found to catalyze the conjugate addition of 1,3-dicarbonyl compounds with enones. The reaction does not require any solvent and proceeds smoothly at room temperature leading to the corresponding adduct in good yields.
Conformational Role of Xanthan Gum in its Interaction with Guar Gum
作者:F. Wang、Y.J. Wang、Z. Sun
DOI:10.1111/j.1365-2621.2002.tb09580.x
日期:2002.11
the effects of chain conformational changes of xanthan or deacetylated xanthangum on its interaction with guar gum. Guar gum was not effective in denaturing xanthangum when the xanthan helical structure was stabilized by salt. The intrinsic viscosities of deacetylated xanthan and guar blends were higher than those calculated from the weight averages of the 2. Conformational change was not observed
INDIUM(III) CHLORIDE CATALYZED CONJUGATE ADDITION OF 1,3-DICARBONYL COMPOUNDS TO α,β-UNSATURATED KETONES*
作者:J. S. Yadav、V. Geetha、B. V. Subba Reddy
DOI:10.1081/scc-120014790
日期:2002.1
ABSTRACT Indium trichloride catalyzes efficiently the Michael reactions of 1,3-dicarbonyl compounds with α,β-unsaturated ketones to afford the corresponding Michael adducts in high yields with high selectivity. *IICT Communication No. 4700.