Boese, Roland; Blaeser, Dieter; Halterman, Ronald L.; Vollhardt, K. Peter C.:

The first example of an interannular, possibly electronically induced asymmetric induction in an organometallic compound.

In: Angewandte Chemie, Jg. 100 (1988) ; Nr. 4, S. 592-594
ISSN: 0044-8249
Zeitschriftenaufsatz / Fach: Chemie
Chiral (cyclopentadienone)cobalt complex I (R, R1 = H, Me), prepd. from sodium carbomethoxy(methyl)cyclopentadienide and ICo(CO)4, followed by photocycloaddn. of 2 molar equiv Me3SiC.tplbond.CH, was methylated with di-Me sulfate to give a cobaltocenium salt (not isolated) which underwent, diastereoselectively, nucleophilic addn. of R2Li (R2 = Me3SiC.tplbond.C, 1-octynyl, EtOC.tplbond.C) giving cyclopentadienecobalt complex II. The crystal structure of I was detd.