Reaction of „Jordan′ s Cation” [Cp2ZrCH3 (thf)]+ with Amino Acid??Derived Isocyanates—A First Synthetic Route to Oligopeptide??Modified Group 4 Bent …

M Oberhoff, G Erker, R Fröhlich

Index: Oberhoff, Markus; Erker, Gerhard; Froehlich, Roland Chemistry - A European Journal, 1997 , vol. 3, # 9 p. 1521 - 1525

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Citation Number: 7

Abstract

Abstract The organometallic cation [Cp 2 ZrCH 3 (thf)]+, employed as the tetraphenylborate salt (1), reacts cleanly in 1: 1 stoichiometry with the isocyanates 2 derived from valine methyl ester or valylvaline methyl ester, respectively. In each case addition of the Zr–CH3 group to the isocyanate sp-carbon center is observed with formation of a functionalized zirconocene cation derivative containing a chelating N-metallated N-acetylvaline methyl ester (3a) or N ...