Applications oxygen heterocycles

Reviews of saturated oxygen heterocycles <00JCS(P1)1291>, routes to 2,2-dimethyl-2H-[l]benzopyrans <00H(53)1193> and pyranonaphthoquinone antibiotics <00T1937>, HIV-1 active Calophyllum coumarins <00H(53)453> and of the application of (3-halovinylaldehydes in heterocyclic synthesis <00H(53)941> have appeared. 

The first fully comprehensive coupling of NP and RP, where the previously described difficulties related to solvents immiscibility were overcome, was developed by Dugo et al. and applied to the analyses of oxygen heterocyclic components of lemon essential oils [22], Based on the configuration described in this work, other applications were developed for the analysis of carotenoids in citrus samples [48], citrus fruit extracts [29], pharmaceutical products [29], and triglycerides in fats and... 

The application of polyketone-derived anions to the synthesis of oxygen heterocycles has much to offer a comprehensive review of this area has been published (77T2159). 

J. W., Mass Spectral Techniques in Heterocyclic Chemistry Applications and Stereochemical Considerations in Carbohydrates and Other Oxygen Heterocycles, 42, 335. 

Carbohydrates and other oxygen heterocycles, applications of mass spectral techniques and stereochemical considerations in, 42, 335 Carbolines, 3, 79... 

Mass spectral techniques in heterocyclic chemistry applications and stereochemical considerations in carbohydrates and other oxygen heterocycles, 42, 335 Mass spectrometry of heterocyclic compunds, 7, 301 of nucleic acids, 39, 79 Medium-large and large 7r-excessive heteroannulenes, 23, 55 Meso-ionic compounds, 19, 1 Metal catalysts, action on pyridines, 2, 179 Metalation, directed, of pyridines, quinolines, and diazines, 52, 187... 

Oxygen heterocycles, applications of mass spectral techniques and stereochemical... 

Applications and Stereochemical Considerations in Carbohydrates and Other Oxygen Heterocycles ... 

The amount of information available on stereochemical effects in mass spectrometry is very large. Compiling this article, however, highlighted the need for more thorough studies on given families of oxygen heterocycles. The few scattered data published to date warrant this closer examination. Carbohydrates seem to be the exception to this statement, due largely to their broad use in various applications. 

The final chapter is concerned with the application of mass spectral techniques in heterocyclic chemistry, in particular to carbohydrates and other oxygen heterocycles, and is authored by J. R. Jocelyn Pare, K. Jankowski, and J. W. ApSimon. 

The potential of the ester enolate Claisen rearrangement for the stereocontrolled synthesis of highly functionalized, complex systems has been demonstrated in numerous applications in natural product synthesis. Utilizing the 1,3-chirality transfer Ireland has synthesized oxygen heterocycles with chiral side chains, such as are found as units in polyether antibiotics and macrolides, starting from enantiomerically pure furanoid or pyranoid glycal systems of type (41), which are easily accessible from carbohydrates (Scheme 65). ... 

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