Electrophilic amination: preparation and use of N-Boc-3-(4-cyanophenyl)oxaziridine, a new reagent that transfers a N-Boc group to N- and C-nucleophiles
We describe the preparation of the title compound 2b via aza-Wittig reaction of N-Boc-triphenyliminophosphorane (6) with 4-cyanobenzaldehyde followed by Oxone oxidation of the resulting imine 5b. Oxaziridine 2b is a stable, crystalline solid, which transfers under mild conditions its N-Boc fragment to primary and secondary amines (to give N(beta)-Boc-hydrazines) and enolates (to give N-Boc-amino derivatives).
Synthesis and properties of myelopeptides possessing differentiating activity
作者:L. A. Fonina、E. V. Kudryavtseva、Zh. D. Bespalova、M. A. Efremov、A. A. Mikhailova、E. A. Kirilina
DOI:10.1134/s1068162010040035
日期:2010.7
Bone marrow peptides Phe-Arg-Pro-Arg-Ile-Met-Thr-Pro (MP-4) and Val-Asp-Pro-Pro (MP-6) have been synthesized by the classical and solid-phase methods of peptide chemistry, and their differentiating activity has been studied on leukemia cell lines HL-60 and K-562. It has been shown that both peptides induce the terminal differentiation of leukemic blasts; however, their mechanisms of action are different.