Chemical Communications

Highly chemo-and regio-selective [2+ 2+ 2] cycloaddition of unsymmetrical 1, 6-diynes with terminal alkynes catalyzed by Cp* Ru (cod) Cl under mild …

Y Yamamoto, R Ogawa, K Itoh

Index: Yamamoto, Yoshihiko; Ogawa, Ryuji; Itoh, Kenji Chemical Communications, 2000 , # 7 p. 549 - 550

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Citation Number: 66

Abstract

Transition-metal catalyzed [2 + 2 + 2] cyclotrimerizations of alkynes has been recognized as a straightforward route to substituted benzenes. 1 The control of both the chemo- and regio-chemistries in the cyclotrimerization of two or three different alkyne components, however, have been a crucial problem. Although the selective cyclocotrimerization of three different alkynes was achieved using stoichiometric zirconocene reagent, 2 the regiochemistry problem has remained ...