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- W2952893285 abstract "Racemic and optically pure 1,2,3,4-tetrahydroisoquinoline-3-carboxylic acids and esters were prepared, via base-catalyzed cyclization of 1,2-bis (halomethyl) benzenes 1 a or b with diethyl 2-(acetylamino)malonate (2), subsequent decarboxylation and amide cleavage. The enantiomer resolution was achieved either by esterification with (-)-menthol followed by column chromatographic separation of the diastereomeric mixture or by diasteromeric salt separation of the benzylic ester with mandelic acid and base- catalyzed saponification of both esters." @default.
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- W2952893285 date "1992-01-01" @default.
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- W2952893285 title "Efficient Synthesis of Racemic and Enantiomerically Pure 1,2,3,4-Tetrahydroisoquinoline-3-carboxylic Acid and Esters" @default.
- W2952893285 doi "https://doi.org/10.1055/s-1992-26325" @default.
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