Tb. Christensen et al., Influence of a dimetal ion binding ferrocene ligand on the samarium diiodide promoted pinacol coupling reaction, CHEM COMMUN, (20), 1999, pp. 2051-2052
Substantial yield increases have been noted in the use of a di-SmI2 binding
ligand for the pinacol coupling of alkyl aldehydes compared to 1:1 complex
es of SmI2 and tetraglyme. High diastereoselectivities of ca. 10:1 are also
observed for alpha-substituted alkyl aldehydes in favour of the (+/-)-isom
ers.