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Beilstein J. Org. Chem. 2026, 22, 527–534, doi:10.3762/bjoc.22.38
Graphical Abstract
Scheme 1: Photochromic reaction of norbornadiene (1a) and quadricyclane (2a) and selected physicochemical pro...
Figure 1: Structures and MOST parameters of representative bis- and trisnorbornadienes 1b–d; t1/2 = half-life...
Scheme 2: Synthesis and photochromic reaction of trisnorbornadiene 1f to the trisquadricyclane 2f0,3 (numberi...
Figure 2: Photometric monitoring of the photoreaction of 1f in MeCN (c = 20 µM) at λex = 315 nm. Inset: plot ...
Figure 3: Left: 19F NMR-spectroscopic monitoring of the photocycloaddition reaction of 1f in the presence of ...
Scheme 3: Stepwise photoreaction of 1f to 2f0,3 (numbering of quadricyclanes 2fm,n: m = number of norbornadie...
Beilstein J. Org. Chem. 2024, 20, 3061–3068, doi:10.3762/bjoc.20.254
Scheme 1: Photoinduced [2 + 2]-cycloaddition–cycloreversion cycle of norbornadiene (1a) and quadricyclane (2a...
Figure 1: Representative bis- and tris-norbornadienyl-substituted benzene derivatives.
Scheme 2: Synthesis of alkynyl-arene-linked norbornadienes 1h–n by Sonogashira–Hagihara coupling reactions.
Scheme 3: Photoisomerization of norbornadiene derivatives 1h–l,n (20 µM) to quadricyclanes 2h–l,n in cyclohex...
Figure 2: Photometric monitoring of the irradiation of 1h (A), 1i (B), 1j (C), 1k (D), 1l (E), and 1n (F); λex...
Scheme 4: Triplet-sensitized photoisomerization of norbornadiene 1o to quadricyclane 2o.
Figure 3: Photometric monitoring of the irradiation of 1i (A) and 1l (B) in the presence of [Ru(phen)3](PF6)2...