作者:Pierre Dixneuf、Armin de Meijere、Ingo Emme、Christian Bruneau、Hans-Christian Militzer
DOI:10.1055/s-2007-990874
日期:2007.11
CMeCH 2 ) 2 (dppb)] catalysis to give 2-(trans-2-ethoxycyclopropyl)ethenyl esters 13 (69-92%, 3 examples). (1-Hydroxycyclopropyl)ethyne (14), under catalysis by [Ru(O 2 CH)(CO)2(PPh 3 )] 2 , reacts with carboxylic acids to yield 1-acetylcyclopropyl esters 15 (49-74%, 4 examples) by Markovnikov-sense addition and intramolecular transesterification. Anti-Markovnikov- and Markovnikov-sense addition of carboxylic
通过用[Ru(O 2 CH)(CO) 2 (PPh 3 )]2 催化将各种羧酸加成(反式-2-乙氧基环丙基)乙炔(1)在Markovnikov意义上区域选择性地进行,环丙基开环组以高产率(44-96%,11个实施例)提供烯丙基乙醛酰基乙基缩醛3。烯丙基乙醛衍生物与碘苯进行钯催化的 Heck 型交叉偶联,随后用伯胺和仲胺捕获 π-烯丙基钯中间体,得到不稳定的 [β-(1-氨基甲基)苯乙烯基]乙醛酰基乙缩醛 12 (24-83) %,4 个例子)。可以在 [Ru(CH 2 CMeCH 2 ) 2 (dppb)] 催化下将羧酸反马尔科夫尼科夫加成 (trans-2-ethoxycyclopropyl) 乙炔 (1) 中的三键而不开环,得到 2-(反式-2-乙氧基环丙基)乙烯基酯 13(69-92%,3 个实例)。(1-羟基环丙基)乙炔(14)在[Ru(O 2 CH)(CO)2(PPh 3 )] 2