Stereoselective Approach to cis-2, 3-Disubstituted Piperidines via Reduction of N-Acyliminium Ion Intermediate: Enantioselective Synthesis of (+)-(2 S, 3 S)-CP-99,994
... Volume: Page: ... Compound 5 upon treatment with benzyl chloroformate in alkaline condition afforded the corresponding N(α),N(δ)-bis-Cbz-ornithine 6 in excellent yield.(14) This was converted efficiently to N-methoxy-N-methylamide (Weinreb's amide) 7 in a ...
