Tandem Oxidative Dearomatizing Spirocyclizations of Propargyl Guanidines and Ureas
2017-07-21T17:38:47Z (GMT)
by
Treatment
of propargyl ureas or guanidines with iodosobenzene diacetate
results in an oxidative tandem amination/etherification dearomatizing
spirocyclization. This transformation leads directly to the complete
framework of the Leucetta alkaloids, spirocalcaridine
A and B.
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CC BY-NC 4.0