Skip to main content
. Author manuscript; available in PMC: 2010 Jul 2.
Published in final edited form as: Tetrahedron. 2009 Jun 27;65(26):4957–4967. doi: 10.1016/j.tet.2009.03.103

Scheme 5.

Scheme 5

Synthesis of gem-dimethyl substrate 22. (Cbz= benzyl carboxy, Bn= benzyl, DCC= N,N′-dicyclohexylcarbodiimide, DMAP= 4-(dimethylamino) pyridine, DIPEA= N,N-diisopropylethylamine, NMM= N-methylmorpholine).