threo??3??Alkyl??and??Arylglutamic Acid Derivatives by Michael Additions of Boc??BMI Li??Enolates to 2, 6??Di??t??butyl??4??methoxyphenyl Alkenoates on the …
K Suzuki, D Seebach
文献索引：Suzuki, Keisuke; Seebach, Dieter Liebigs Annalen der Chemie, 1992 , # 1 p. 51 - 62
Abstract The conjugated esters 5, 6, 8, 9 mentioned in the title are prepared from the corresponding aryl acetate 4 and aldehydes by aldol condensation (direct enoylation of the hindered phenol with the corresponding unsaturated acid chlorides gave only poor yields). To avoid double-bond shifts, the 4-phenyl 2-butenoate 7a was prepared from the saturated one by selenation/elimination (see 7b, c in Scheme 1). In contrast to methyl and ethyl ...
