The palladium-catalyzed skeletal rearrangement of 3-arylcyclobutanones into 1-indanones is reported. A Pd(0)/IMes catalyst allows for the cleavage of C(carbonyl)–C(sp3) and C(sp2)–H bonds to result in the skeletal rearrangement, and neither an extra reactive functional group nor a directing group is required to promote the reaction. Deuterium-labeling experiments indicate that the C–C bond is initially
1-Indanone der Formel III oder IIIa
worin R¹ bis R⁷ bevorzugt Wasserstoff oder Alkyl bedeuten oder benachbarte Reste R¹ bis R⁴ einen Ring bilden, erhält man in einer Einstufenreaktion, indem man eine Verbindung I
mit einer Verbindung der Formel II
in flüssigem Fluorwasserstoff umsetzt.
式 III 或 IIIa 的 1-茚酮
其中 R¹ 至 R⁷ 优选为氢或烷基,或相邻的基 R¹ 至 R⁴ 形成一个环,通过与化合物 I 反应一步反应获得
与式 II 的化合物反应
在液态氟化氢中反应而得。
The State of Russian Science: Focus Groups with Nuclear Physicists
作者:Theodore P. Gerber、Deborah Yarsike Ball
DOI:10.2747/1060-586x.18.3.183
日期:2002.1
Two specialists on Russian society and politics examine the condition of Russian science and scientists based on secondary literature, official statistics, and focus groups conducted with 19 Russian nuclear physicists in October 2001. The article discusses the implications of their findings for international security and for Russia's economic and political trajectories.