A Practical Method for Selective Cleavage of atert-ButoxycarbamoylN-Protective Group fromN,N-Diprotected α-Amino Acid Derivatives Using Montmorillonite K-10
作者:J. Nicolás Hernández、Fernando R. Pinacho Crisóstomo、Tomás Martín、Víctor S. Martín
DOI:10.1002/ejoc.200700296
日期:2007.10
9 pages, 3 tables, 1 scheme.-- Supporting information (26 pages) available at: http://www.wiley-vch.de/contents/jc_2046/2007/o200700296_s.pdf
Enantiodivergent Synthesis of (+)- and (−)-Pyrrolidine 197B: Synthesis of<i>trans</i>-2,5-Disubstituted Pyrrolidines by Intramolecular Hydroamination
作者:Sixto J. Pérez、Martín A. Purino、Daniel A. Cruz、Juan M. López-Soria、Rubén M. Carballo、Miguel A. Ramírez、Israel Fernández、Víctor S. Martín、Juan I. Padrón
DOI:10.1002/chem.201602708
日期:2016.10.17
A highlyefficient, diastereoselective, iron(III)‐catalyzed intramolecular hydroamination/cyclization reaction involving α‐substituted amino alkenes is described. Thus, enantiopure trans‐2,5‐disubstituted pyrrolidines and trans‐5‐substituted proline derivatives were synthesized by means of a combination of enantiopure starting materials, easily available from l‐α‐amino acids, with sustainable metal
A New Selective Cleavage of <i>N</i>,<i>N</i>-Dicarbamoyl-Protected Amines Using Lithium Bromide
作者:J. Nicolás Hernández、Miguel A. Ramírez、Víctor S. Martín
DOI:10.1021/jo026300b
日期:2003.2.1
A mild and new procedure for the selective cleavage of an alkoxycarbonyl group (Boc, CBz) in N,N-dicarbamoyl-protected amino compounds is described. The method is based on the use of lithium bromide in acetonitrile and is compatible with a large range of other functionalities present in the substrates. Compared with other reported methodologies, the procedure is particularly useful for the Cbz-selective
A practical, catalytic and selective deprotection of a Boc group in N,N′-diprotected amines using iron(<scp>iii</scp>)-catalysis
作者:Juan M. López-Soria、Sixto J. Pérez、J. Nicolás Hernández、Miguel A. Ramírez、Víctor S. Martín、Juan I. Padrón
DOI:10.1039/c4ra12143k
日期:——
A selective, catalytic and practical method for removing a Boc group from several N,N′-diprotected amino acids and amine derivatives using iron(iii) salts as sustainable catalysts is described.