Draw the structures of the major products expected from the reactions given below.

Structure of an enamines with a nitrogen atom in a six-membered ring.

Structure of an enamine with a nitrogen atom and a double bond in a six-membered ring.

Structure of an enamine with a nitrogen atom and a single bond in a six-membered ring.

Structure of an enamine with a nitrogen atom and a double bond in a six-membered ring.