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September 2010
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73 Reads
ChemInform
ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
August 2010
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6 Reads
ChemInform
ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
August 2010
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8 Reads
ChemInform
ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
August 2010
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9 Reads
ChemInform
ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
August 1996
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11 Reads
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56 Citations
The Journal of Organic Chemistry
The influence of the nature of the acylating agent and the power output on the chemoselectivity of the microwave-mediated acylation of 1,2- and 1,3-amino alcohols catalyzed by dibutyltin oxide has been studied. The method constitutes an efficient procedure for the selective N-acylation of amino alcohols.
May 1996
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18 Reads
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29 Citations
Synlett
Acylase I from Aspergillus species catalyzes the reaction of transesterification between vinyl acetate and racemic derivatives of 2-(hydroxymethyl)piperidine. It has been found that the enantioselectivity of the reaction depends on the solvent. Also it has been observed that remote substituents have a great influence on the enantioselectivity.
May 1995
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15 Reads
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38 Citations
Synlett
The formation of dibutylstannylene acetals from polyols or amino alcohols and dibutyltin oxide is accelerated under microwave heating. We have found that under these conditions, only catalytic amounts of dibutyltin oxide (0.2 mol equiv.) are needed to achieve moderate to excellent conversions. The method is applied to the selective benzoylation of a variety of polyols and to an amino alcohol. The selectivity of the transformation can be modulated upon changes in some experimental variables (nature of the solvent and power output of the microwave oven).
January 1994
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12 Reads
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43 Citations
Synlett
The formation of dibutylstannylene acetals from polyols and dibutyltin oxide is accelerated under microwave heating. The method is applied to the regioselective benzoylation of a variety of polyols. Some preliminary results on a catalytic tin-mediated benzoylation of polyols are also presented.
November 1993
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5 Reads
Tetrahedron Asymmetry
May 1993
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10 Reads
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29 Citations
Tetrahedron Asymmetry
The lipase catalyzed esterifications of derivatives of propane-1,2,3-triol and butane-1,2,4-triol in organic solvents have been studied. The influence of several factors (lipase source, organic solvent, additives and structural variations in the substrates) on the selectivity have been investigated. Good levels of regio- and enantioselectivity have been achieved, providing practical methods for the synthesis of these chiral building blocks.
... 7 Since Pasteur carried out the first resolution based on diastere-8 omeric salt formation, several resolution methods -such as 9 chromatographic separations or chemical and biochemical reac- 10 tions -have been developed. 11 Over the last decade the enzyme-catalyzed kinetic resolution 12 of racemic mixtures has become a common tool for preparation 13 of enantiomerically pure compounds. Conventionally enzymatic 14 reactions are performed in aqueous solutions, but many exam-15 ples indicate that enzymes are also active in organic solvents. ...
May 1993
Tetrahedron Asymmetry
... In connection with our long-standing interest on the structure (1-4) and reactivity (24)(25)(26)(27) of aromatic compounds, we have undertaken a thorough computational study on chlorinated biphenyls. Comprehensive research on the bioactivity of chlorinated biphenyls requires a complete set of physicochemical properties. ...
May 1996
Synlett
... Supplementing dibutylstannylene acylation with microwave irradiation drastically reduced this reaction time to the order of 15 min. The resulting acylation occurred as a mixture of 2-O, 3-O, and 2,3-O modified monosaccharides, with prior primary hydroxyl protection; some unmodified carbohydrate remained when using either toluene or acetonitrile solvation [122]. ...
May 1995
Synlett
... Selective benzoylation of polyols occurs under MW irradiation conditions (84). The reaction carried out in the presence of dibutyltin oxide as solvent exclusively leads to the product that is benzoylated in the C-2 position (eq. ...
January 1994
Synlett
... Selective N-acylation of amino alcohols was performed by using lipase [8] and dibutyltin oxide [9] as a catalyst, and both methods were conducted under microwave irradiation. N-Acylation of α, -diamino alcohol was also reported. ...
August 1996
The Journal of Organic Chemistry
