Heading south: The 1,2-migration of the acyloxy, phosphatyloxy, and sulfonyloxy groups in allenyl systems has been discovered. This migration, combined with the transition-metal-catalyzed cycloisomerization reaction, leads to the efficient synthesis of tri- and tetrasubstituted acyl-, phosphatyl-, and sulfonyloxy-substituted furans as single regioisomers.
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Sromek et al. (2004) studied this question.