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Photoisomerization of Highly Alkylated Butadienes
Author(s) -
Hopf Henning,
Lipka Helmut,
Traetteberg Marit
Publication year - 1994
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.199402041
Subject(s) - photoisomerization , cyclobutene , alkylation , chemistry , derivative (finance) , photochemistry , isomerization , medicinal chemistry , organic chemistry , catalysis , ring (chemistry) , financial economics , economics
Bicyclobutane formation and a 1,5 H shift , and not photocyclization to the cyclobutene derivative, predominate on the irradiation of highly alkylated nonplanar 1,3‐dienes 1 . Bicyclobutanes 2 are also formed from dienes with two central t Bu groups, whereas the corresponding i Pr‐substituted compounds afford almost exclusively 3 . For dienes with an i Pr and a t Bu group, the two pathways are almost equally likely to occur.