Dianion Approach to Chiral Cyclopropene Carboxylic Acids
نویسندگان
چکیده
منابع مشابه
Sensing of enantiomeric excess in chiral carboxylic acids.
Cinchona alkaloids (quinine, quinidine, cinchonine, cinchonidine) alkylated at N(1) with chloromethyl anthracene can serve as fluorescent sensors for chiral carboxylic acids. These cinchona ammonium salts are shown to bind chiral carboxylic acids while displaying an increase in fluorescence intensity that can be utilized in determination of enantiomeric excess (ee). Sensor arrays composed of fo...
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Diketo fatty acids prepared by ozonization of cyclopropene fatty acids have been separated and purified by chromatographic techniques. Mass spectra of esters of these compounds and of methanethiol adducts of cyclopropene acid esters are reported and interpreted. Location of the ring from examination of mass spectra of these derivatives appears to be a straightforward matter.
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Comparisons were made of the ratios of the specific activities of stearic acid to oleic acid in adipose tissue and liver triglycerides of rats given methyl stearate-lJ4C dissolved in 0.25 ml of corn oil and Sterculia foetida oil. The ratios were about 3 in the corn oil control animals compared to 31 to 43 in adipose tissue and 44 to 246 in liver triglycerides of the S. foetida test animals. Whe...
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A novel chiral 1,10-phenanthroline-based fluorescent sensor was designed and synthesized from optical active β-amino acids. It used 1,10-phenanthroline moiety as a fluorescent signaling site and binding site, with optically active β-amino acids as a chiral barrier site. Notably, the optically active β-amino acids were obtained by a Lewis base catalyzed hydrosilylation of β-enamino esters accord...
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The chiroptical properties of enantiomerically pure bicyclo[3.3.1]nona-2,6-diene-2,6-dicarbonitrile and related acids were studied by circular dichroism spectroscopy and theoretical computations. A consideration of the molecular structure of the synthesized difunctional compounds revealed that chromophores are predisposed to transannular through-space interaction due to a favourable conformatio...
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ژورنال
عنوان ژورنال: Organic Letters
سال: 2008
ISSN: 1523-7060,1523-7052
DOI: 10.1021/ol801714c