137374-29-9Relevant academic research and scientific papers
Photoreaction of 2,3-Bispyrazine in the Crystalline State and in Acetonitrile Solution
Tsutsumi, Takehiro,Takeuchi, Atsuo,Hashimoto, Yukihiko,Hasegawa, Masaki,Iitaka, Yoichi
, p. 1533 - 1536 (1991)
The photoreaction behaviors of 2,3-bispyrazine (1) in the crystalline state as well as in acetonitrile solution were examined mechanistically.In the crystalline state, stepwise cycloadditions occurred between two facing molecules under the crystal lattice control to give a orthocyclophane derivative in 74percent yield.Photoirradiations of 1 in acetonitrile solution were also performed.In this case, products distributions were changed depending on the cut off wavelength.
Photochemical Reaction of 2,3-Dipyrazine Derivatives in the Crystalline State and in Solution
Takeuchi, Atsuo,Komiya, Hitoshi,Tsutsumi, Takehiro,Hashimoto, Yukihiko,Hasegawa, Masaki,et al.
, p. 2987 - 2994 (2007/10/02)
The photoreaction of 2,3-dipyrazine derivatives was carried out in the crystalline state and in solution.Among them, 2,3-di(p-chlorostyryl)pyrazine an d2,3-di(p-cyanostyryl)pyrazine were photoreactive in the crystalline state and gave, upon photoirradiation, orthocyclophanes in 76 and 58percent yields, respectively.Such a topochemical photo- behavior was interpreted on the basis of X-ray crystllographic analyses of the crystals.The photoirradiation of 2,3-distyrylpyrazine in solution gave orthocyclophane and anti head-to-tail type monocyclic dimer as the major products.The yields of the products varied depending on the solvent; with decreasing the polarity of the solvent, the yield of the cyclophane decreased, whereas the yield of the monocyclic dimer increased.In a similar manner, the photoirradiation of the other 2,3-distyrylpyrazine derivatives in acetonitrile/chloroform (10/1) or acetonitrile gave the corresponding orthocyclophanes and monocyclic dimers, respectively, as major products through two types of excimers.
