Chemistry of Dienyl Anions. I. Crystalline Dienyl Anions by Direct Reaction of Conjugated and Non-conjugated Dienes with Alkali Metals in the Presence of Et<sub>3</sub>N
Series of acyclic and cyclic dienyl anions were prepared from both conjugated and non-conjugated dienes by direct metalation with alkalimetals (Li, Na, K, Rb, and Cs) in tetrahydrofuran in the pre...
adjacent carbons. However, when the reaction was carried out under irradiation using a low-pressure Hg lamp, addition/reduction products were obtained in good yield. Hydrogen bromide, formed by H-abstraction of a bromine radical from alkenes, is likely to play a key role in the reductive ATR reaction.
CuI-amidobis(phosphine) catalyzed C(sp3)–C(sp3) direct homo- and hetero-coupling of unactivated alkanes via C(sp3)–H activation
作者:Sachin C. Sonawane、Rani Gourkhede、Prateek Saini、Srinivasan Ramakrishnan、Maravanji S. Balakrishna
DOI:10.1039/d4cc01119h
日期:——
Herein, we present a CuI-dimer, [CuIPh2PC6H4C(O)NC6H4PPh2-o}]2, which catalyzed directC(sp3)–H homocoupling of benzyl and cycloalkane derivatives with excellent yields and regio-selectivity. The method is very simple and tolerates various functionalities. Synergistic metal–ligand cooperativity was observed in Cu–N bond cleavage and protonation of nitrogen, and facilitates a bifunctional pathway,
在此,我们提出了一种 Cu I-二聚体,[Cu I Ph 2 PC 6 H 4 C( O )NC 6 H 4 PPh 2 - o }] 2 ,它催化了苄基和具有优异产率和区域选择性的环烷烃衍生物。该方法非常简单并且可以容忍各种功能。在 Cu-N 键断裂和氮质子化中观察到协同金属-配体协同作用,并促进双功能途径,最大限度地减少催化中间体的自由能波纹。
The course of allylic coupling reactions involving allylnickel complexes