Abstract
Transition-metal-catalyzed cross-couplings have been recognized as a powerful tool
for sustainable syntheses. Despite the fact that remarkable progress was achieved
by palladium and nickel catalysis, the high price and toxicity still remained a drawback.
Recently, naturally more abundant and less toxic low-valent chromium salts, such as
Cr(II) and Cr(III) chlorides, displayed notable unique catalytic reactivity. Thus,
recent progress in the field of chromium-catalyzed cross-couplings and related reactions
are highlighted in the present short review until December 2018.
1 Introduction and Early Chromium-Mediated Reactions
2 Chromium-Catalyzed Cross-Couplings and Related Reactions
3 Conclusion
Key words
chromium - cross-coupling - C–H activation - C–X formation - homogeneous catalysis