Regioselective [2 + 2]-photocycloaddition reactions of chiral tetronates-influence of temperature, pressure, and reaction medium.
The intramolecular [2 + 2]-photocycloaddition of the 1,3-divinyl-2-cyclopentyl tetronates was performed under various conditions to give perfect diastereoselectivity and a regioselectivity of up to 85/15 in the presence of gamma-cyclodextrin by differentiating the two chemically very similar double bonds of .
Fleck
Martin
M
Lehrstuhl für Organische Chemie 1, Technische Universität München, 85747 Garching, Germany.
Yang
Cheng
C
Wada
Takehiko
T
Inoue
Yoshihisa
Y
Bach
Thorsten
T