NEW MATERIAL:A keto-enol tautomeric compound expressed by formula I [R is lower alkyl, arylalkyl, hetero-arylalkyl, aryl, alkylamino, etc.; X is CH2, formula II, O, S, SO2 or =NCH2; Y is H, halogen, lower alkyl, aryloxy, arylalkoxy, etc.; (n) is 0-2] or formula III. ...
1.For the first part, we stressed reactions of sulphoxide with 1,3-dicarbonyl compounds promoted by Cu(OAc)2·H2O, 2,2′-biimidazole and iodobenzene diacetate.第一部分为二醋酸碘苯、二价铜离子及联咪唑促进下的1,3-二羰基化合物与亚砜的反应研究。 2.The first part studied the regioselective ad...
摘要：1,3-Dicarbonyl compounds useful as medicines, agricultural chemicals, perfumes, and their intermediates are prepared by reacting a specific . alpha.,&bgr;-unsaturated carbonyl compound with a specific organic copper lithium compound in the presence of an aprotic inert organic solvent, and then ...
1,3-dicarbonyl compound chelating agent, 0-25 % wt. Of additional different chelating agent(s), 0.5-40 % wt. Nitrogen-containing carboxylic acid or an imine, and 2-98 % wt. Polar organic solvent. The formulations are useful to remove residue from wafers following a resist plasma ashing ...
Reverse regioselectivity: The first catalytic asymmetric C-1 functionalization of 1,3-dicarbonyl compounds by an aldol reaction is described, which regioselectively affords 6-hydroxyhexane-2,4-dione derivatives as the only product with high optical purity of up to 93 % ee. Furthermore, this ...
Dicarbonyl(hexamethylene-1,3,5,7-tetramine- kN1)(η5-pentamethylcyclopentadienyl) iron(II) tetrafluoridoborate. The article describes the crystal structure of the metal-organic compound [Fe(C10H15)(C6H12N4)(CO)2]BF4. Topics discussed include the method used to crysta... M'thiruaine,Cyprian,...
Al2O3/MeSO3H: A Novel and Recyclable Catalyst for One-Pot Synthesis of 3,4-Dihydropyrimidinones or Their Sulfur Derivatives in Biginelli Condensation Al2O3/CH3SO3H (AMA) is an efficient catalyst for the three-component condensation reaction of aldehyde, 1,3-dicarbonyl compound, and urea or ...
A sufficient amount of the 1,3-dicarbonyl compound is used to enhance the resistance of the polyvinyl halide to deterioration in physical properties, including, for example, discoloration and embrittlement, under the heat and/or light conditions to which the polymer will be subjected. Very small ...
The dehydration of α-diazo-δ-hydroxy-1,3-dicarbonyl compounds gave the conjugated α-diazo unsaturated 1,3-dicarbonyl compound 3 and non-conjugated α-diazo unsaturated 1,3-dicarbonyl compound 4 at reflux in benzene in the presence of Ac2 O, Et3 N and DMPA (cat.). The ratio of compoun...
In the model Michael addition of 1,3-dicarbonyl indane compound 4a to nitrostyrene 5a, the diastereo- and enantioselectivities in the reaction using these organocatalysts varied significantly with different functional substitutes. For example, 3d, 3e, or 3h, has poor enantioselectivity for both ...