Site selectivity in the reactions of 1,3-dipoles with norbornadiene derivatives
作者:D. Cristina、M. De Amici、C. De Micheli、R. Gandolfi
DOI:10.1016/s0040-4020(01)92451-2
日期:1981.1
2-diazopropane and C-pnenyl-N-methyl-nitrone react with the sole tetrasubstituted double bond of 1a–c in stereo- and site-specific cycloadditions. The quantitative evaluation of the two possible reaction paths was performed by glc analysis. The compounds detected were those arising from Diels-Alder cycloreversions of the thermally labile intermediate adducts 2 and 3 (Scheme 1). The results were rationalized