Yb(OTf)3-catalyzed propargylation and allenylation of 1,3-dicarbonyl derivatives with propargylic alcohols: one-pot synthesis of multi-substituted furocoumarin
depending on the nature of propargylic alcohols. In addition, catalytic quantities of Yb(OTf)3 can also effectively promote the propargylation and allylation of 4-hydroxycoumarins at the 3-position. By applying this reaction as the key step, a multi-substituted furocoumarin can easily be synthesized in a one-pot procedure. The advantages of this method are broad scope, mild conditions, and easy handling
Propargylation of 1,3-dicarbonyl compounds catalyzed by 2,3-dichloro-5,6-dicyano-1,4-benzoquinone and sodium nitrite in the presence of molecular oxygen and formic acid
作者:Dongping Cheng、Xiayi Zhou、Xiaoliang Xu、Jizhong Yan
DOI:10.1039/c6ra06704b
日期:——
Catalyzed by 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) and sodium nitrite, the coupling reaction of 1,3-diarylpropynes and 1,3-dicarbonyl compounds using molecularoxygen as a terminal oxidation was developed. The reaction was promoted dramatically in...
Propargylation of 1,3-Dicarbonyl Compounds with 1,3-Diarylpropynes via Oxidative Cross-Coupling between sp<sup>3</sup> C−H and sp<sup>3</sup> C−H
作者:Dongping Cheng、Weiliang Bao
DOI:10.1021/jo8010039
日期:2008.9.1
A highly efficient oxidative-coupling reaction between diarylpropargylic sp(3) C-H and active methylenic sp(3) C-H was achieved with DDQ as oxidant. The reaction afforded a direct method for the propargylation of 1,3-dicarbonyl compounds, thus providing a concise synthesis of the corresponding products.
Inexpensive and Efficient Synthesis of Propargylic Substituted Active Methylene Compounds Catalyzed by FeCl<sub>3</sub>
作者:Sukhendu Maiti、Srijit Biswas、Umasish Jana
DOI:10.1080/00397910903534031
日期:2010.12.22
A highlyefficient and practical method for the synthesis of propargylic substituted 1,3-dicarbonyl compounds with direct use of propargylic alcohols in the presence of inexpensive and environmentally benign FeCl3 (5 mol%) has been presented. The reaction works with varieties of substrates at room temperature without an inert atmosphere with an excellent yield. The present method can also be employed