Efficient Enantioselective Synthesis of Condensed and Aromatic-Ring-Substituted Tyrosine Derivatives
摘要:
An efficient access to both condensed and conjugated tyrosine analogues of high enantiomeric purity is described. Novel ring-substituted tyrosines were synthesized by Suzuki cross couplings of appropriately protected L-3-iodotyrosine with a series of activated and deactivated boronic acid derivatives to achieve the target compounds in high yields. D-and L- 4- hydroxy-1-naphthylalanines were readily prepared from the corresponding alpha- enamide in two different approaches, by asymmetric hydrogenation as well as by unselective hydrogenation and enzymatic resolution of the racemic mixture.
Efficient Enantioselective Synthesis of Condensed and Aromatic-Ring-Substituted Tyrosine Derivatives
摘要:
An efficient access to both condensed and conjugated tyrosine analogues of high enantiomeric purity is described. Novel ring-substituted tyrosines were synthesized by Suzuki cross couplings of appropriately protected L-3-iodotyrosine with a series of activated and deactivated boronic acid derivatives to achieve the target compounds in high yields. D-and L- 4- hydroxy-1-naphthylalanines were readily prepared from the corresponding alpha- enamide in two different approaches, by asymmetric hydrogenation as well as by unselective hydrogenation and enzymatic resolution of the racemic mixture.
Efficient Enantioselective Synthesis of Condensed and Aromatic-Ring-Substituted Tyrosine Derivatives
作者:Sebastian Knör、Burkhardt Laufer、Horst Kessler
DOI:10.1021/jo060704c
日期:2006.7.1
An efficient access to both condensed and conjugated tyrosine analogues of high enantiomeric purity is described. Novel ring-substituted tyrosines were synthesized by Suzuki cross couplings of appropriately protected L-3-iodotyrosine with a series of activated and deactivated boronic acid derivatives to achieve the target compounds in high yields. D-and L- 4- hydroxy-1-naphthylalanines were readily prepared from the corresponding alpha- enamide in two different approaches, by asymmetric hydrogenation as well as by unselective hydrogenation and enzymatic resolution of the racemic mixture.