Titanium‐Catalyzed [6π+2π]‐Cycloaddition of Alkynes and Allenes to 7‐Substituted 1,3,5‐Cycloheptatrienes
作者： Vladimir A. D'yakonov , Gulnara N. Kadikova , Dmitry I. Kolokol'tsev , Ilfir R. Ramazanov , Usein M. Dzhemilev
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摘要: The reaction of 7-alkyl(allyl,phenyl)-1,3,5-cycloheptatrienes with alkynes and allenes, catalyzed by the two-component Ti(acac)2Cl2–Et2AlCl system, resulting in formation substituted bicyclo[4.2.1]nona-2,4-dienes bicyclo[4.2.1]nona-2,4,7-trienes up to 90 % yield, was accomplished. structures obtained compounds were confirmed X-ray diffraction 1H 13C NMR spectroscopic analysis.
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