Photochemistry of Crystalline Chlorodiazirines: The Influence of Conformational Disorder and Intermolecular Cl···NN Interactions on the Solid-State Reactivity of Singlet Chlorocarbenes
作者:Carlos N. Sanrame、Christopher P. Suhrada、Hung Dang、Miguel A. Garcia-Garibay
DOI:10.1021/jp026641t
日期:2003.5.1
analysis, which revealed melting endotherms prior to thermal decomposition. Photochemical results in crystalline solids were analogous to those observed in solution, and the products were analyzed in terms of the corresponding singlet-state chlorocarbene intermediates (5a−d). Irradiation of 4a in solution and in crystals resulted in formation of azine 9a by reaction of carbene 5a with its precursor. Equally
用 3-取代的 3-氯二氮丙啶与 4-联苯-(4a)、(4-联苯)甲基-(4b)、2-(4-联苯)乙基-(4c)和 1,1 进行光化学研究-二甲基-1-(4-联苯)甲基(4d)取代基。通过涉及在相转移催化下用次氯酸叔丁酯氧化的程序,由相应的脒(7)制备氯二氮杂环丙烷。4a-d 的结晶性质是通过差示扫描量热分析确定的,该分析揭示了热分解之前的熔融吸热。结晶固体中的光化学结果类似于在溶液中观察到的结果,并根据相应的单线态氯卡宾中间体 (5a-d) 分析产物。4a 在溶液和晶体中的辐照导致通过卡宾 5a 与其前体反应形成吖嗪 9a。同样选择性地,二氮丙啶 4d 通过 1,2-Ph 从卡宾 5d 迁移得到烯烃 6d 作为唯一的产物。相比之下,化合物 4b 和 4c 的辐照重新...