Unprecedented Transformation of a Directing Group Generated In Situ and Its Application in the One-Pot Synthesis of 2-Alkenyl Benzonitriles
作者:Ravi Kumar、Rajesh K. Arigela、Bijoy Kundu
DOI:10.1002/chem.201501449
日期:2015.8.10
An unprecedented protocol for the transformation of benzoyl azides into benzonitrile derivatives via iminophosphoranes generated in situ is described. The strategy was successfully applied to the de‐novo synthesis of 2‐alkenylated benzonitrile derivatives from benzoyl azides through ortho CH activation/alkenylation followed by subsequent rearrangement. The salient features of this protocol involve
描述了通过原位产生的亚氨基正膦将苯甲酰基叠氮化物转化为苯甲腈衍生物的空前协议。该策略被成功地应用到从头合成2-烯化的苯甲腈通过由苯甲酰叠氮化物衍生物邻Ç ħ激活/烯基化,接着随后的重排。该方案的显着特征涉及通过使用较便宜的Ru催化剂在温和的反应条件下在一个罐中通过氰化和烯化作用引入两个重要的功能。通过分离和表征(使用31 P NMR)具有两个邻位的中间体来建立机理 在特定的反应条件下,亚氨基正膦和烯烃的官能团。
Organogold(III) Iminophosphorane Complexes as Efficient Catalysts in the Addition of 2-Methylfuran and Electron-Rich Arenes to Methyl Vinyl Ketone
作者:David Aguilar、María Contel、Rafael Navarro、Esteban P. Urriolabeitia
DOI:10.1021/om700453s
日期:2007.8.1
14) have been found to be the more effective in both the presence and absence of silver salts. With acid-sensitive electron-rich arenes the catalytic activity of these cycloaurated complexes outperformed that of the AuCl3 salt. The synthesis and characterization of new iminophosphorane coordination and organogold(III) compounds are provided along with the results for the catalytic studies.
在2-甲基呋喃和一些富电子芳烃与甲基乙烯基酮的加成反应中,已评估了含有C,N-钳位配体的环化化合物作为预催化剂。在银盐存在下,所有络合物均显示出与Au(I)络合物相当的催化活性。含有膦亚胺配体(R的化合物3 P NR')为C,N-骨架如[金κ 2 -C,NC 6 H ^ 4(PPH 2 Ñ(C 6 H ^ 4 X)-2}氯2 ](X = H,13; X = Me,14已经发现,在存在和不存在银盐的情况下,)都更有效。使用酸敏感的富电子芳烃,这些环链配合物的催化活性优于AuCl 3盐。提供了新的亚氨基正膦配位化合物和有机金(III)化合物的合成和表征,以及用于催化研究的结果。
Pd-catalysed ortho-alkoxylation of benzamides N-protected with an iminophosphorane functionality
作者:Pedro Villuendas、Elena Serrano、Esteban P. Urriolabeitia
DOI:10.1039/c5nj00189g
日期:——
The mild Pd-catalysed ortho-alkoxylation of benzamides, protected as keto-stabilised iminophosphoranes, with alcohols, is regioselective and tolerates different substituents and alcohols.