One-pot three-component synthesis of tetrasubstituted NâH pyrroles from secondary propargylic alcohols, 1,3-dicarbonyl compounds and<i>tert</i>-butyl carbamate
作者:Victorio Cadierno、José Gimeno、Noel Nebra
DOI:10.1002/jhet.301
日期:——
Several tetrasubstituted NH pyrroles, functionalized with ester or ketone groups at C-3 position, were prepared by one-pot coupling of secondary propargylic alcohols with 1,3-dicarbonyl compounds and tert-butyl carbamate, via in situ deprotection of the corresponding pentasubstituted N-Boc pyrroles. The three-component coupling process was promoted by the combined use of the 16-electron ruthenium(II)
几个四取代Ñ ħ吡咯,在C-3位置用酯或酮基团官能化,是由单罐制备耦合仲炔丙醇与1,3-二羰基化合物和叔丁基氨基甲酸叔丁酯,通过 原位相应五取代的脱保护N-Boc吡咯。三组分偶联过程是由组合使用的16电子钌(II)催化剂的促进的[Ru(η 3 -2-C 3 H ^ 4 ME)(CO)(DPPF)] [的SbF 6 ](DPPF = 1,1'-双(二苯基膦基)二茂铁)和三氟乙酸(TFA)。J.杂环化学。(2010)。