Manganese Salan Complexes as Catalysts for Hydrosilylation of Aldehydes and Ketones

Abstract

Manganese has attracted significant recent attention due to its abundance, low toxicity, and versatility in catalysis. In the present study, a series of manganese (III) complexes supported by salan ligands have been synthesized and characterized, and their activity as catalysts in the hydrosilylation of carbonyl compounds was examined. While manganese (III) chloride complexes exhibited minimal catalytic efficacy without activation of silver perchlorate, manganese (III) azide complexes showed good activity in the hydrosilylation of carbonyl compounds. Under optimized reaction conditions, several types of aldehydes and ketones could be reduced with good yields and tolerance to a variety of functional groups. The possible mechanisms of silane activation and hydrosilylation were discussed in light of relevant experimental observations.

Co‐Catalyzed Hydrosilylation of Ketones under Base‐Free Conditions: A Convenient Route to Silyl Ethers or Secondary Alcohols

“…first-row transition metal complexes. [9][10][11][12][13] The major research area has intensified on manganese, [14][15][16][17] iron, [18][19][20][21][22][23][24][25] nickel, [25][26][27][28] and cobalt. [24,25,29,30] However, despite numerous protocols for the highly selective Co-catalyzed hydrosilylation of alkynes and alkenes, the modification of carbonyl groups seemed more challenging.…”