D-A-D-T-type four-component radical dual-difunctionalization and acylative azidation of two different alkenes.

From a single alkene to two different alkenes! An iron-catalyzed four-component reaction involving an aldehyde, two different alkenes and TMSN is developed to assemble these four reactants in an orderly fashion based on the inherent nucleophilic/electrophilic reaction activity of the radicals and alkenes a double radical addition, providing various multifunctional compounds containing an azido group and two carbonyl groups.

Radical-Dual-Difunctionalization and Trifluoromethylative Decarboxylation of Two Different Alkenes.

A convenient Fe-catalyzed A-D-A-T-type radical-dual-difunctionalization and cross-coupling of two different alkenes to provide chain elongated and trifluoromethylated aromatic alkenes has been developed.

Fe-catalyzed Decarbonylative Alkylative Spirocyclization of -Arylcinnamamides: Access to Alkylated 1-Azaspirocyclohexadienones.

For the convenient introduction of simple linear/branched alkyl groups into biologically important azaspirocyclohexadienones, a practical Fe-catalyzed decarbonylative cascade spiro-cyclization of N-aryl cinnamamides with aliphatic aldehydes to provide alkylated 1-azaspiro-cyclohexadienones was developed. Aliphatic aldehydes were oxidative decarbonylated into primary, secondary and tertiary alkyl radicals conveniently and allows for the subsequent cascade construction of dual C(sp)-C(sp) and C=O bonds via radical addition, spirocyclization and oxidation sequence.

Four-component radical-dual-difunctionalization (RDD) and decarbonylative alkylative peroxidation of two different alkenes with aliphatic aldehydes and TBHP.

From difunctionalization of a single alkene to radical-dual-difunctionalization of two different alkenes! Abundant aliphatic aldehydes were readily decarbonylated into alkyl radicals for the cascade construction of C(sp3)-C(sp3), C(sp3)-C(sp3) and C(sp3)-O bonds via double radical addition and radical-radical coupling, following the intrinsic nucleophilic/electrophilic reactivity of both the radicals and alkenes.

Four-Component Radical Dual Difunctionalization (RDD) of Two Different Alkenes with Aldehydes and -Butyl Hydroperoxide (TBHP): An Easy Access to β,δ-Functionalized Ketones.

A convenient Fe-catalyzed four-component radical dual difunctionalization and ordered assembly of two alkenes with aromatic/aliphatic aldehydes and TBHP to provide chain elongated β,δ-functionalized ketones via a one-pot procedure has been developed. Aldehydes were homolytically cleavaged to produce acyl radicals and subsequently allowed for the successive construction of C(sp)-C(sp), C(sp)-C(sp), and C(sp)-O bonds via dual radical insertions and radical-radical coupling, following the intrinsic nucleo/electrophilic reactivity of both the radicals and alkenes.

[Study on two different aromas styles of tobacco from Guizhou by characteristics spectroscopic methods].

This paper made use of three-dimensional fluorescence and ultraviolet-absorption spectrum to analyze the spectral characteristics of etroleum ether extract from Guizhou flue-cured tobacco and the overall characteristic spectral information of tobacco chemical substances were obtained. The three dimensional fluorescence and ultraviolet-visible absorption spectrum of each petroleum ether extract of flue-cured tobacco from different areas are generally similar, but their intensity is different. There have three characteristic peaks in three dimensional fluorescence spectra: I: Ex/Em = 297/326 nm, II: Ex/Em = 250/330 nm, III: Ex/Em = 225/336 nm respectively and meanwhile the order of these peaks intensity is I > III > II.