M. Nyerges et al., 2-oxoindolin-3-ylidene derivatives as 2 pi components in 1,3-dipolar cycloadditions of azomethine ylides, SYNLETT, (1), 1999, pp. 111-113
The 1,3-dipolar cycloaddition of 2-oxoindolin-3-ylidene derivatives with va
rious azomethine ylides has been investigated. The structure and stereochem
istry of cycloadducts was studied in detail by n.m.r, spectroscopic methods
.