Intramolecular C−N Bond Addition of Amides to Alkynes Using Platinum Catalyst
摘要:
The intramolecular aminoacylation of alkynes using ortho-alkynylacetanilides proceeds in very high yields in the presence of PtCl2 catalyst. This reaction provides not only a useful procedure for synthesizing 2,3-disubstituted indoles at once from ortho-alkynylaniline derivatives, but also an interesting mechanistic aspect; the intramolecular C-N bond addition of amides to alkynes takes place readily in the presence of Pt(II) catalyst.
Oxidation during reductive cyclisations using Bu3SnH
作者:W.Russell Bowman、Harry Heaney、Benjamin M. Jordan
DOI:10.1016/s0040-4020(01)96061-2
日期:1991.1
Reductivecyclisations using Bu3SnH include an “oxidation” step if the removal of an acidic proton from the intermediate cyclised radical, by Bu3SnH acting as a base, is favourable. A “pseudo” SRN1 mechanism is proposed.
如果通过Bu 3 SnH作为碱从中间环化自由基中除去酸性质子是有利的,则使用Bu 3 SnH进行的还原环化包括一个“氧化”步骤。提出了一种“伪” S RN 1机制。
“Propylene spaced” allyl tin reagents: A new class of fluorous tin reagents for allylations under radical and metal-catalyzed conditions
作者:Dennis P. Curran、Zhiyong Luo、Peter Degenkolb
DOI:10.1016/s0960-894x(98)00435-1
日期:1998.9
A new generation of propylene-spaced fluorous allyltin reagents [(Rf(CH2)3)3SnCH2CH = CH2] is described. These succeed in radical allylations where their lower homologs (ethylene-spaced) fail, and they provide improved performance in transition metal catalyzed allylations. The reagents and byproducts are readily separated by simple fluorous-organic liquid-liquid or solid-liquid extractions.
Nickel-catalysed aromatic Finkelstein reaction of aryl and heteroaryl bromides
作者:Alastair A. Cant、Rajiv Bhalla、Sally L. Pimlott、Andrew Sutherland
DOI:10.1039/c2cc30956d
日期:——
A fast and efficient nickel-catalysed iodination reaction of aryl and heteroaryl bromides has been developed. The transformation was found to be general for a wide range of substrates and was used for the synthesis of iodo-PK11195, an imaging agent of Alzheimer's disease and iniparib, a compound used in the treatment of breast cancer.
Palladium-Catalyzed Selective Heck-Type Diarylation of Allylic Esters with Aryl Halides Involving a β-OAc Elimination Process
作者:Yan Liu、Bo Yao、Chen-Liang Deng、Ri-Yuan Tang、Xing-Guo Zhang、Jin-Heng Li
DOI:10.1021/ol1031552
日期:2011.3.4
Palladium-catalyzed selective Heck-type diarylation of allylic esters with arylhalides has been developed. Allylic esters are reacted with aryl iodides to provide the corresponding 1,3-diaryl propenes through a β-OAc elimination process. It is noteworthy that the methodology can be applied in constructing the indole and benzofuran skeletons.
1,2-Asymmetric induction in radical reactions. Deuteration and allylation reactions of β-oxy-o-Iodoanilides.
作者:Dennis P. Curran、Ann C. Abraham
DOI:10.1016/s0040-4020(01)80401-4
日期:1993.5
Chiral radicals were generated by radical translocation reactions of β-oxy-o-iodoanilides and their asymmetric deuteration and allylationreactions were studied.