Tetrahedron Letters p. 7811 - 7814 (1992)
Update date:2022-08-04
Topics:
Yerxa, Benjamin R.
Moore, Harold W.
The thermally induced ring expansion of 4-(1-pyrrolyl)-4-trimethylsiloxycyclobutenones to 5-hydroxy-8-trimethylsiloxyindolizines and their subsequent oxidation to the rare indolizine-5,8-diones is described. When the rearrangement is carried out in the presence of DMAD the indolizines are trapped in an 8+2 cycloaddition to give [3.2.2]cyclazines.
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