Access to Enantiomerically Enriched cis-2,3-Disubstituted Azetidines via Diastereoselective Hydrozirconation
摘要:
An asymmetric variant of the hydrozirconation reaction has been established starting from Boc-protected chiral allylic amines. The resulting diastereoselectively formed N-functionalized organozirconiums can be considered as promising chirons. In this case, they have been transformed into enantiomerically enriched cis-2,3-disubstituted azetidines through a iodination/cyclization sequence.
Access to Enantiomerically Enriched <i>cis</i>-2,3-Disubstituted Azetidines via Diastereoselective Hydrozirconation
作者:Tarun K. Pradhan、K. Syam Krishnan、Jean-Luc Vasse、Jan Szymoniak
DOI:10.1021/ol200323r
日期:2011.4.1
An asymmetric variant of the hydrozirconation reaction has been established starting from Boc-protected chiral allylic amines. The resulting diastereoselectively formed N-functionalized organozirconiums can be considered as promising chirons. In this case, they have been transformed into enantiomerically enriched cis-2,3-disubstituted azetidines through a iodination/cyclization sequence.
Synthesis of peptide derived amino alcohols II. Synthetic methodology for the preparation of tertiary alcohols
作者:Jollie D. Godfrey、Eric M. Gordon、Derek J. Von Langen
DOI:10.1016/s0040-4039(00)95370-x
日期:1987.1
Synthetic methods are described for the preparation of a series of tripeptide derived aminoalcohols (i.e.,). These novel peptidyl tertiary alcohols are potential inhibitors of angiotensin converting enzyme (ACE). The synthetic targets resemble acyltripeptide substrates for the enzyme, but contain a -CHOH(CH3)-CH2-NH- moiety, as replacement for the scissile amide bond.