Abstract
The tuning of aldol/cyclization cascade reactions of glycine Schiff bases with 2-cyano benzaldehydes provides access to non-natural α-amino acid derivatives substituted alternatively with phthalides or isoindolinones, depending on the strength of the used base. Moreover, a preliminary screening of catalysts and conditions for development of asymmetric versions identified chiral bifunctional phase transfer catalysts as particularly promising, leading to the α-amino esters 3-substituted phthalides in high yields and good diastereo- and enantioselectivity.
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