作者:J. Hal�sz、G. T�th、I. K�das、G. �rvai、K. Mikl�、R. Hae�ner
DOI:10.1007/bf00811021
日期:——
Base catalyzed Michael addition of 5-nitropentan-2-one ethylene ketal (I) and cyclohex-2-enone (2), subsequent deprotection, and intramolecular aldol condensation yields the 8-methyl-5-nitro-1-octalone isomers (5a, b). The structure, relative configuration, and conformation of 5a and 5b were elucidated utilizing the results of H-1 and C-13 NMR investigations