Direct propargylation of furan and arene by propargylic alcohols promoted by bisoxazoline–ruthenium catalysts
作者:Cédric Fischmeister、Loïc Toupet、Pierre. H. Dixneuf
DOI:10.1039/b501305d
日期:——
The mononuclear [(arene)(bisoxazoline)ruthenium(II)
(NCMe)][(BF4)2] complex 4 characterised by X-ray crystallography is a catalyst precursor for the propargylation of methylfuran and 1,3-dimethoxybenzene directly with propargyl alcohols incorporating terminal or internal alkyne bonds.
单核[(arene)(bisoxazoline)ruthenium(II) (NCMe)][(BF4)2]复合物 4 通过 X 射线晶体学表征,是甲基呋喃和 1,3-二甲氧基苯直接与含有末端或内部炔键的丙炔醇进行丙炔化反应的催化剂前体。
Mononuclear Ruthenium Catalysts for the Direct Propargylation of Heterocycles with Propargyl Alcohols
作者:Emilio Bustelo、Pierre?H. Dixneuf
DOI:10.1002/adsc.200404219
日期:2005.2
yield, mononuclear [(p-cymene)RuCl(CO)(PR3)][OTf] complexes are more active to achieve the same reaction. Low temperature NMR experiments performed on the stoichiometric reaction of the parent [(p-cymene)RuCl(PR3)][B(ArF)4] and the alkynol show the unexpected in situ formation, viaallenylidene and hydroxycarbene intermediates, of the carbonyl complexes [(p-cymene)RuCl(CO)(PR3)][B(ArF)4] [ArF=3,5-(CF3)2C6H3]
Activation of Mononuclear Arene Ruthenium Complexes for Catalytic Propargylation Directly with Propargyl Alcohols
作者:Emilio Bustelo、Pierre H. Dixneuf
DOI:10.1002/adsc.200600512
日期:2007.4.2
ligand. The in situ generated catalyst has been applied to catalytic transformations of alkynes and propargylic alcohols: propargylation of furans, propargyl ether synthesis from internal and terminal propargylic alcohols with propargyl, homopropargyl and allyl alcohols, selective dimerization of phenylacetylene into E-enyne, and propargyl alcohol rearrangement into α,β-unsaturated aldehydes and ketones
[(对伞花基)RuX(CO)(PR 3)] [OTf](R = Ph,Cy; X = Cl,OTf)类型的单核络合物促进呋喃与炔丙醇的直接催化炔丙基化。这些前体是通过活化炔丙醇从[(对-cymene)RuCl(OTf)(PR 3)]原位产生的,导致经由亚烯基和烯基-羟基卡宾中间体形成羰基配体。催化活性物质的产生需要短的初始热活化以诱导对-异丙基配体的去配位。在原位生成的催化剂已用于炔烃和炔丙醇的催化转化:呋喃的炔丙基化,内部和末端炔丙醇与炔丙基,高炔丙基和烯丙基醇的炔丙基醚合成,苯乙炔的选择性二聚为E-烯炔和炔丙醇重排为α ,β-不饱和醛和酮通过Meyer-Schuster重排。含有内部CC键的炔丙醇的炔丙基化表明通过Nicholas型中间体(金属稳定的炔丙基阳离子)的活化。