Tetrahedron Letters p. 2951 - 2952 (1991)
Update date:2022-07-30
Topics:
Vlaar, Cornelis P.
Klumpp, Gerhard W.
7,7-Dilithionorbornane 4a is formed from 7,7-dibromonorbornane 4b by reduction with 4.5 equiv of lithium p,p'-di-tert-butylbiphenyl at -100 deg C, at which temperature it adds to ethylene.On warming it rearranges to 1-lithio-5-(2-lithioethyl)cyclopentene 5.
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(1995)
