Tetrahedron Letters p. 4689 - 4692 (1989)
Update date:2022-08-17
Topics:
Komatsu, Koichi
Tsuji, Kyotaro
Takeuchi, Ken'ichi
The title cation 6 has been prepared and exhibits an intramolecular charge-transfer band at αmax 440 nm in CH2Cl2 ; 6 undergoes a facile retro<4+4> cleavage owing to weakening of the central ? bonds due to ?-? orbital mixing.
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