Sigmatropic Rearrangements of Allyl Amine Oxides The Meisenheimer Rearrangement

3]-Sigmatropic Rearrangements of Allyl Amine Oxides The Meisenheimer Rearrangement 

5-Sigmatropic shifts are not pericyclic because suprafacial overlapping of cyclic p-orbitals is not involved. In these shifts, the orbitals from the breaking bond and the lone pair overlap with the p-orbitals in the TS. These reactions have planar nonaromatic eight-centered cyclic transition states with orthogonal orbital 

Indicate which of the following reactions are orbital symmetry allowed processes and which are forbidden. Also indicate the order of sigmatropic shift for each reaction. Each reaction may take place in one or more steps. Justify your answer. 

Suggest a mechanism for each of the following transformations. More than one step may be involved in each case. Predict the major and minor products when more than one product is expected. 

Predict the expected product with structure and stereochemistry for each of the following reactions  

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