alpha-Oxymethyl Ketone Enolates for the Asymmetric Mannich Reaction. From Acetylene and N-Alkoxycarbonylimines to beta-Amino Acids This work was supported by the University of the Basque Country, the Basque Government (Projects UPV 170.215-G47/98, EX-1998-124) and in part by M. E. C. (Project PB 98-0549). Grants to A.S. and M.C.G. from the Basque Government, and to C.L. from the Government of Navarra and M.E.C. are acknowledged
Angew Chem Int Ed Engl. 2000 Mar;39(6):1063-1066.
doi: 10.1002/(sici)1521-3773(20000317)39:6<1063::aid-anie1063>3.0.co;2-y.