Tetrahedron Letters p. 4689 - 4692 (1990)
Update date:2022-09-26
Topics:
Lange, Gordon L.
Organ, Michael G.
Lee, Moses
Photoaddition of cyclohexenones 1a or 1b to methyl cyclobutene- (2), cyclopentene- (5) or cyclohexenecarboxylate (9) shows a gradual reversal of regioselectivity from head-to-head (3a/b) to head-to-tail adducts (11a/b). These results are inconsistent with the generally accepted dipolar interaction model.
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