1291087-94-9Relevant academic research and scientific papers
Multicomponent mannich reactions with boron enolates derived from diazo esters and 9-BBN
Luan, Yi,Schaus, Scott E.
supporting information; experimental part, p. 2510 - 2513 (2011/07/09)
Chemical equations presented. Diazo esters, arylboranes, and carbamoyl imines undergo a 3-component Mannich condensation reaction. Catalyzed by Cu(II) salts, the reaction affords the corresponding isocyanate Mannich product: one that can be easily trapped in situ by other nucleophiles. The Mannich condensation corresponds to an α,α-disubstituted enolate addition to imines. The reaction was rendered asymmetric by using the (-)-phenylmenthol ester in good yield and selectivities.
