Sterically Hindered Lithium Dialkylamides; A Novel Synthesis of Lithium Dialkylamides fromN-t-Alkyl-N-benzylideneamines and the Isolation of Highly Hindereds-Alkyl-t-alkylamines
Sterically Hindered Lithium Dialkylamides; A Novel Synthesis of Lithium Dialkylamides fromN-t-Alkyl-N-benzylideneamines and the Isolation of Highly Hindereds-Alkyl-t-alkylamines
multiple stereocenters from the same set of starting materials. We report herein the first diastereodivergent [3+2] annulation of aromatic aldimines with alkenes via C-H activation by half-sandwich rare-earth catalysts. This protocol provides an efficient and general route for the selective synthesis of both trans and cis diastereoisomers of multi-substituted 1-aminoindanes from the same set of aldimines
asymmetric [3 + 2] annulation of aldimines and styrenes has been achieved with a high level of diastereo- and enantioselectivity, offering an efficient method for the synthesis of both the trans and cis diastereomers of a novel class of chiral 1-aminoindane derivatives containing two contiguous stereocenters from the same set of starting materials. Moreover, the asymmetric [3 + 2] annulation of aldimines
Sterically Hindered Lithium Dialkylamides; A Novel Synthesis of Lithium Dialkylamides from<i>N</i>-<i>t</i>-Alkyl-<i>N</i>-benzylideneamines and the Isolation of Highly Hindered<i>s</i>-Alkyl-<i>t</i>-alkylamines
作者:Ian A. Cliffe、Roger Crossley、Robin G. Shepherd
DOI:10.1055/s-1985-31452
日期:——
The convenient synthesis of lithium amides from imines 1 and organolithium reagents, and the isolation of the related highly hindered dialkylamines 3 are described.