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- W2332968800 abstract "Tryptophans are building blocks for many natural products. This paper describes the enantiospecific synthesis of ring-A substituted tryptophan derivatives from commercially available gramines using chiral phase-transfer conditions. This one-pot reaction avoids protecting/deprotecting the indolylic nitrogen of gramine by choosing a chemoselective quaternization reagent, 4-(trifluoro-methoxy)benzyl bromide, to produce an electrophilic salt intermediate, which is subsequently alkylated in good yield with high enantiomeric excess." @default.
- W2332968800 created "2016-06-24" @default.
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- W2332968800 date "2012-10-18" @default.
- W2332968800 modified "2023-10-18" @default.
- W2332968800 title "One-Pot Enantioselective Synthesis of Tryptophan Derivatives via Phase-Transfer Catalytic Alkylation of Glycine Using a Cinchona-Derived Catalyst" @default.
- W2332968800 doi "https://doi.org/10.1055/s-0032-1317382" @default.
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