Abstract
This chapter reviews the recent advances of donor and donor–donor carbenes for the synthesis of heterocycles. Since new sources of donor-type carbenes have been developed, heterocycles can be obtained through carbene involved reactions in a safe manner. This chapter is organized based on the approaches of generating donor-type carbenes, including carbene precursors, such as diazo-type carbene sources, alkyne-type carbene sources, cyclopropenes, aryl silyl ketones, simple aryl aldehydes and typical reaction mode, such as alkyne cycloisomerization, carbene/alkyne metathesis, and Brook rearrangement. With these carbene sources as reaction substrates, the synthetic examples of heterocycles, as well as the reaction mechanisms are discussed.
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