10-π electrocyclic transition states, Lk=2.
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.
1,
t
Bu
4,
t
Bu
4,(R,R) ΔΔG 0.0
4,(S,S) ΔΔG 8.4, ee= 1.4x10
6
: 1
© H. S. Rzepa, 2006-07.