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8318097 
Journal Article 
Enantioselective photochromic reaction of a [2.2]metacyclophan-1-ene 
Takeshita, M; Yamato, T 
2002 
Yes 
Angewandte Chemie (International Edition)
ISSN: 1433-7851
EISSN: 1521-3773 
WILEY-V C H VERLAG GMBH 
WEINHEIM 
41 
12 
2156-2157 
English 
19746628 
WOS:000176386900036 
No racemization occurs in the first reported enantioselective photochromic reaction. Upon irradiation with UV light, a single enantiomer of [2.2]metacyclophane-1-ene 1a undergoes photocyclization to give a single enantiomer of tetrahydropyrene 1b. Upon irradiation with visible light, 1b is converted back cleanly into the initial enantiomer 1a. 
Chiral resolution; Circular dichroism; Cyclophanes; Enantioselectivity; Photochromism