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DEPENDENCE OF SPECTRAL PARAMETERS IN 1H AND 13C NMR SPECTRA OF AROMATIC COMPOUNDS UPON SUBSTITUENT SPATIAL-STRUCTURAL PECULIARITIES II. Investigation of the dependence of δi H basic spectral parameters in NMR 1H spectra of C6H5X monosubstituted benzenes upon substituent constants σPrevious Article in session
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Pd−Catalyzed Domino Alkyne Dimerization/Double [2+2] Allenyne Cycloaddition
Published: 01 November 2009 by MDPI in The 13th International Electronic Conference on Synthetic Organic Chemistry session General Organic Synthesis
Abstract: An efficient and controlled Pd−catalyzed synthesis of attached-ring bis(dihydropyran) fused cyclobutenes via alkyne dimerization followed by double [2+2] cyclization of the resulting bis(allenyne) in a domino sequence has been accomplished.