Mechanism
Mechanism of compound 53 to compound 55.
References:
Chérest, M.; Felkin, H. Tetrahedron Lett. 1968, 9, 2205-2208.
Richter, J.M.; Ishihara, Y.; Masuda, T.; Whitefield, B.W.; Llamas, T.; Pohjakallio, A.; Baran, P.S. J. Am. Chem. Soc. 2008, 130, 17938-17954.