Stoichiometrically Sensitized Decarboxylation Occurring in the Two-Component Molecular Crystals of Aza Aromatic Compounds and Aralkyl Carboxylic Acids
作者:Hideko Koshima、Kuiling Ding、Yosuke Chisaka、Teruo Matsuura、Ikuko Miyahara、Ken Hirotsu
DOI:10.1021/ja971156a
日期:1997.10.1
crystals of aralkyl carboxylic acids such as 3-indolepropionic acid (a) and 1-naphthylacetic acid (b) combined with acridine (1) or phenanthridine (2) as an electron acceptor. The 1:1 hydrogen bonded crystals were prepared by recrystallization from the solutions. Irradiation of the crystals at −70 °C caused highly selective decarboxylation to give corresponding decarboxylated compounds alone in nearly
通过利用一系列芳烷基羧酸如 3-吲哚丙酸 (a) 和 1-萘基乙酸 (b) 与吖啶 (1) 或菲啶 (2) 结合的双组分分子晶体,可以实现高度选择性的光脱羧反应。电子受体。通过从溶液中重结晶制备 1:1 氢键晶体。由于晶格中自由基物质的热运动较小,在 -70 °C 下对晶体进行辐照会导致高度选择性脱羧,从而以几乎定量的产率单独得到相应的脱羧化合物。在照射晶体时,通过从酸到 1 或 2 的电子转移以及随后的质子转移和脱羧作用产生羧酸根和氢吖啶或氢菲啶自由基。