Organic base-catalyzed stereodivergent synthesis of (R)- and (S)-3-amino-4,4,4-trifluorobutanoic acids
作者:Norio Shibata、Takayuki Nishimine、Naoyuki Shibata、Etsuko Tokunaga、Kosuke Kawada、Takumi Kagawa、Alexander E. Sorochinsky、Vadim A. Soloshonok
DOI:10.1039/c2cc30627a
日期:——
base-catalyzed reaction of (S)-N-tert-butanesulfinyl (3,3,3)-trifluoroacetaldimine with dialkyl malonates was found to be effective for synthesis of both (S,S(S)) and (R,S(S)) beta-aminomalonates in high yield with good to excellent diastereoselectivity (76-98% de). The products of this Mannich reaction provide direct access to beta-trifluoromethyl-beta-alanine of either (R) or (S) absolute configuration