new a typedefed struct

There is a struct:

struct _point{
	int x;
	int y;
};
typedef _point Point;

struct _queue_node{
	 Point coordinate;
	struct _queue_node* next;
};
typedef struct _queue_node Node;
typedef struct _queue_node* pNode;

Why i can't new a Node:
pNode n=new Node(); //error:no appropriate default constructor
available
i can only pNode n=new _queue_node();
Thank you