F. Slowinski et al., Highly stereoselective induction in the cobalt-mediated [2+2+2] cycloaddition of chiral phosphine oxides substituted linear enediynes, TETRAHEDR L, 40(32), 1999, pp. 5849-5852
The cobalt(I)-catalyzed highly stereoselective [2+2+2] cyclization has been
realized for the first time with chiral phosphine oxides substituted linea
r enediynes. Depending the substituents on the phosphorus atom, the cycload
dition was achieved with a level of diastereoselectivity of 74%. (C) 1999 E
lsevier Science Ltd. All rights reserved.