Regioselective synthesis of optically active (pyrazolyl) pyridines with adjacent quaternary carbon stereocenter: chiral N, N-donating ligands

~%

~%

~%

~%

~%

~%

~%

~%

~%

~%

~%

~%

~%

~%

~%

~77%

~%

~%

~%

~%

~%

~60%

~%

~%

~%

~%

~%

~%

~%