Asymmetric Synthesis of β-Nitro Ketones via Michael Addition of Lithiated α-Amino Nitriles to Nitroalkenes
作者:Dieter Enders、Dominik Förster、Gerhard Raabe、Jan W. Bats
DOI:10.1021/jo8017318
日期:2008.12.19
amine auxiliary, are metalated and used as nucleophiles in asymmetric Michaeladditions to nitroalkenes to afford the Michael adducts in good yields and good to excellent diastereoselectivities. After chromatographic purification, the diastereomerically pure 1,4-adducts are cleaved under acidic conditions to give the beta-nitro ketones in good yields and with two exceptions in good to excellent enantiomeric