Journal of Organometallic Chemistry p. C1 - C4 (1984)
Update date:2022-07-31
Topics:
Tarhouni, R.
Kirschleger, B.
Villieras, J.
New stable monohalocarbenoids RCXLiCH3 (X = Cl, Br; R = H, CH3, alkyl) are prepared by bromine-lithium exchange from the corresponding bromohaloalkanes RCXBrCH3 and s-butyllithium in the presence of one equivalent of lithium bromide at -115 deg C in a mixture of THF/Et2O/pentane.These carbenoids are treated with carbonyl compounds and give epoxides at -90 deg C (X = Br).Epoxidation is activated by the presence of LiBr (electrophilic activation).
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