Chemistry Letters, Vol.46, No.12, 1793-1796, 2017
4,4 '-Bipyridine-catalyzed Stereoselective &ITtrans&IT-Diboration of Acetylenedicarboxylates to 2,3-Diborylfumarates
Acetylenedicarboxylates undergo trans-addition of tetraalkoxydiboron in THF at 60 degrees C in the presence of 4,4'-bipyridine (5mol%) as a catalyst to give 2,3-diborylfumarates in good yields with high stereoselectivity.