sec-Butyllithium is a very strong base, exceedingly useful in organic synthesis. SBL has found particular utility in the ortho metallation of aromatic substrates. SBL is also a very effective initiator of anionic polymerization of styrene and conjugated dienes. The synthesis of solution SBR and of styrenic thermoplastic elastomers (TPEs), in particular, is facilitated by SBL. References: The Chemistry of Organolithium Compounds, ed. Zvi Rappoport and Ilan Marek, Wiley, 2004, West Sussex, England.
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