Iron(III) Tosylate in the Preparation of Dimethyl and Diethyl Acetals from Ketones and <font> <b>β</b> </font>-Keto Enol Ethers from Cyclic <font> <b>β</b> </font>-Diketones
作者:Horacio Mansilla、María M. Afonso
DOI:10.1080/00397910802219361
日期:2008.7.24
Abstract An efficient method for conversion of ketones to their corresponding dimethyl and diethyl acetals and of cyclic β-diketones into β-keto enol ethers using Fe(OTs)3 as a catalyst is described.
Zinc-mediated Alkylation and Acylation of 1,3-Dicarbonyl Compounds
作者:J. S. Yadav、B. V. Subba Reddy、Anand Kumar Mishra
DOI:10.1246/cl.2010.280
日期:2010.3.5
1,3-Dicarbonyl compounds undergo smooth allylation, benzylation, propargylation, and acylation with halidesusing metallic zinc in DMF at 60 °C to afford the corresponding allyl, benzyl, 2-propynyl...
1,3-二羰基化合物在 60 °C 下在 DMF 中使用金属锌与卤化物进行平滑的烯丙基化、苄基化、炔丙基化和酰化,得到相应的烯丙基、苄基、2-丙炔基...
Synthesis of tetracyclic chromenones via platinum(ii) chloride catalysed cascade cyclization of enediyne–enones
作者:Mahalingam Sivaraman、Paramasivan T. Perumal
DOI:10.1039/c3ob41911h
日期:——
PtCl2 catalysed cascade cyclization of an enediyneâenone system to afford a tetracyclic chromenone is reported, which proceeds through two consecutive highly regioselective 6-endoâdig cyclizations in a single step with the formation of two new CâC bonds and two new rings in excellent yield. A mechanism for this transformation is proposed based on the isolated intermediates.
Efficient and practical synthesis of β-keto enol ethers from diketones catalyzed by B(C 6 F 5 ) 3 at room temperature has been described.
已经描述了在室温下由 B(C 6 F 5 ) 3 催化的二酮有效合成 β-酮烯醇醚。
Hydrosilylation of Terminal Alkynes with Alkylidene Ruthenium Complexes and Silanes
作者:Candice Menozzi、Peter I. Dalko、Janine Cossy
DOI:10.1021/jo051637+
日期:2005.12.1
Ruthenium alkylidene complexes 1-3 mediate hydrosilylation of alkynes with silanes. When triethoxy- or triphenylsilanes are used as silylating agents, the reaction affords alpha-substituted vinylsilanes as major products.