REACTIVITY OF TRICARBONYL(PENTADIENYL)IRON(1- PREPARATION OF AN OPTICALLY PURE TRICARBONYL(DIENE) IRON COMPLEX VIA 2ND-ORDER ASYMMETRIC TRANSFORMATION() CATIONS )
Wa. Donaldson et al., REACTIVITY OF TRICARBONYL(PENTADIENYL)IRON(1- PREPARATION OF AN OPTICALLY PURE TRICARBONYL(DIENE) IRON COMPLEX VIA 2ND-ORDER ASYMMETRIC TRANSFORMATION() CATIONS ), Organometallics, 13(1), 1994, pp. 6-7
Reactions of tricarbonyl(2,4-dimethylpentadienyl)iron(1+) hexafluoroph
osphate (1) with sodium methoxide/methanol and with phosphines are rep
orted. Use of (S)-neomenthyldiphenylphosphine gives a 3:2 mixture of d
iastereomers. Slow diffusion-controlled recrystallization of the mixtu
re gives the single, optically pure diastereomer 6a in >80% mass recov
ery via a second-order asymmetric transformation involving reversible
addition of the phosphine. The stereochemistry of 6a at C2 (S) was det
ermined by single-crystal X-ray diffraction analysis.