Preparation and chiroptical properties of optically active vinyl ether-iron and olefin-iron complexes. A CD quadrant rule correlating absolute configurations
…, KH Chu, TS Coolbaugh, M Rosenblum…
Index: Begum, M. Kohinoor; Chu, Kai-Hsuan; Coolbaugh, Thomas S.; Rosenblum, Myron; Zhu, Xiao-Ya Journal of the American Chemical Society, 1989 , vol. 111, # 14 p. 5252 - 5259
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Citation Number: 11
Abstract
Abstract: Exchange etherification of dicarbonylcyclopentadienyl (q2-ethyl vinyl ether) iron tetrafluoroborate (4) with optically active primary and secondary alcohols yields a mixture of diastereomeric cations. These isomers are in rapid equilibrium at room temperature. The most favorable equilibrium ratio of such diastereomers (4: l) is achieved with (+)-or (-)- menthol, and the absolute configuration of the predominant diastereomer, formed with (-)- ...
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