New carbon-carbon bond in an organic reaction with the original functional groups completely disappearing

http://www.nature.com/nchem/journal/v2/n4/full/nchem.576.html
Mundal et al form a New carbon-carbon bond in an organic reaction with the original functional groups completelely dissapearing, boc protected allyl hydrazone, takes part in an triflimide catalysed sigmatropic reaction with subsequent loss of isobutylene, nitrogen gas and carbondioxide