B(C<sub>6</sub>F<sub>5</sub>)<sub>3</sub>-Catalyzed Formal (<i>n</i> + 3) (<i>n</i> = 5 and 6) Cycloaddition of Bicyclo[1.1.0]butanes to Medium Bicyclo[<i>n</i>.1.1]alkanes
Herein, a B(C6F5)3-catalyzed formal (n + 3) (n = 5 and 6) cycloaddition of bicyclo[1.1.0]butanes (BCBs) with imidazolidines/hexahydropyrimidines is described. The reaction provides a modular, atom-economical, and efficient strategy to two libraries of synthetically challenging medium-bridged rings, 2,5-diazabicyclo[5.1.1]nonanes and 2,6-diazabicyclo[6.1.1]decanes, in moderate to excellent yields. This
本文描述了双环[1.1.0]丁烷(BCB)与咪唑烷/六氢嘧啶的B(C 6 F 5 ) 3催化的缩甲醛( n +3)( n =5和6)环加成。该反应为合成具有挑战性的中等桥环库(2,5-二氮杂双环[5.1.1]壬烷和2,6-二氮杂双环[6.1.1]癸烷)提供了一种模块化、原子经济且高效的策略,反应速度适中。达到优异的产量。该反应还具有操作简单、反应条件温和、底物范围广泛等特点。放大实验和产品的各种合成转化进一步凸显了合成实用性。
Bischoff, Chemische Berichte, 1898, vol. 31, p. 3246
作者:Bischoff
DOI:——
日期:——
Scholtz; Jaross, Chemische Berichte, 1901, vol. 34, p. 1510
作者:Scholtz、Jaross
DOI:——
日期:——
Veer, Recueil des Travaux Chimiques des Pays-Bas, 1938, vol. 57, p. 989,995
作者:Veer
DOI:——
日期:——
Pyrazolidines. I. 1,2-Diarylpyrazolidines<sup>1</sup>