We report a new mode of reactivity displayed by lithiated O-benzyl carbamates carrying an N-aryl substituent: upon lithiation, the N-aryl group is transferred cleanly from N to C. An arylation of the carbamate results, providing a route to alpha,alpha-arylated secondary or tertiary alcohols. We also report density functional theory calculations supporting the proposal that arylation proceeds through a dearomatizing attack on the aromatic ring, a significantly lower energy pathway than the 1,2-acyl transfer observed with related N-alkyl carbamates.

Clayden J., Farnaby W., Grainger D.M., Hennecke U., Mancinelli M., Tetlow D.J., et al. (2009). N to C aryl migration in lithiated carbamates: α-arylation of benzylic alcohols. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 131(10), 3410-3411 [10.1021/ja808959e].

N to C aryl migration in lithiated carbamates: α-arylation of benzylic alcohols

Mancinelli M.;
2009

Abstract

We report a new mode of reactivity displayed by lithiated O-benzyl carbamates carrying an N-aryl substituent: upon lithiation, the N-aryl group is transferred cleanly from N to C. An arylation of the carbamate results, providing a route to alpha,alpha-arylated secondary or tertiary alcohols. We also report density functional theory calculations supporting the proposal that arylation proceeds through a dearomatizing attack on the aromatic ring, a significantly lower energy pathway than the 1,2-acyl transfer observed with related N-alkyl carbamates.
2009
Clayden J., Farnaby W., Grainger D.M., Hennecke U., Mancinelli M., Tetlow D.J., et al. (2009). N to C aryl migration in lithiated carbamates: α-arylation of benzylic alcohols. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 131(10), 3410-3411 [10.1021/ja808959e].
Clayden J.; Farnaby W.; Grainger D.M.; Hennecke U.; Mancinelli M.; Tetlow D.J.; Hillier I.H.; Vincent M.A.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/706404
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