C. Baldoli et al., 1,3-DIPOLAR CYCLOADDITION REACTIONS OF ALKENYLALKOXYCARBENE CHROMIUM COMPLEXES, Journal of organometallic chemistry, 476(2), 1994, pp. 30000027-30000029
New spiropyrazoline derivatives from the 1,3-dipolar cycloaddition of
diazomethane to alkenylalkoxycarbene complexes are isolated and fully
characterized as Cr(CO)5 complexes. Me3SiCHN2 reacts selectively with
the C-C double bond to give new pentacarbonylchromium carbene complexe
s.