702684-35-3Relevant articles and documents
Asymmetric Syntheses of 2-(1-Aminoethyl)phenols
Kuendig, E. Peter,Botuha, Candice,Lemercier, Gilles,Romanens, Patrick,Saudan, Lionel,Thibault, Sylvie
, p. 561 - 579 (2004)
Three different routes were probed for the synthesis of enantiomerically enriched 2-(1-aminoethyl)phenols and their methyl ethers. The first route centers on diastereoselective nucleophile addition to chiral imines. The second route has as key steps the enantioselective reduction of a ketone followed by nucleophilic substitution, and the third route involves a diastereoselective imine reduction. The efficiency of the approach depends on the substrate substitution pattern. All three methods work well for the parent compound 2-(1-aminoethyl)phenol (1) but the third route is the most efficient, providing the compound with >96% enantiomer excess in three steps with an overall yield of 71%. Conversely, for the ortho-methyl analogue 2, the first method is best. For the t-Bu-substituted analogue 3, only moderate enantiomeric enrichment was achieved.
