Furopyridines. VII. Preparation and hydrolysis of 2??cyano and 3??cyano derivatives of furo [3, 2??b]??, furo [2, 3??c]??and furo [3, 2??c] pyridine

~95%

~%

~95%

~%

~%

~%

~93%

~%

~52%

~91%

~%

~94%

~%

~%

~86%

~%

~65%

~%