Dean Regas chats with astronomer David Levy, unpacking the discovery of the famous Comet Shoemaker-Levy 9. Listen in and find out how you can start chasing comets yourself.

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In the presence of (−)-sparteine or a (+)-sparteine surrogate, organolithiums add to N-alkenyl-N′-arylureas to give benzylic organolithiums in an enantioselective manner. Under the influence of DMPU, ...