Remote stereocontrol using rotationally restricted amides: (1,5)-asymmetric induction
作者:Jonathan Clayden、Megan Darbyshire、Jennifer H. Pink、Neil Westlund、Francis X. Wilson
DOI:10.1016/s0040-4039(97)10289-1
日期:1997.12
The stereochemical influence of a rotationallyrestricted amide group extends widely across substituted aromatic amides. Stereogenic centres can be created with high levels of (1,5)-stereocontrol when electrophiles are added to the enolates of 2-ketonaphthamides or to lithiated 2-alkylnaphthamides. Sequential double lateral lithiation of 2,6-dialkylbenzamides can lead to compounds containing (1,5)
Asymmetric induction using atropisomers: Diastereoselective additions to 2-acyl-1-naphthamides
作者:Jonathan Clayden、Neii Westlund、Francis X Wilson
DOI:10.1016/0040-4039(96)01129-x
日期:1996.7
The amide group of 2-acyl-N,N-dialkyl-1-naphthamides, twisted perpendicular to the naphthyl ring, controls the stereoselectivity of attack of nucleophiles on the 2-substituent. Selectivities of >140:1 may be achieved with bulky nucleophiles, which attack anti to the N,N-dialkyl group.