Enantio- and Diastereoselective Synthesis of 1,5-<i>syn</i>-(<i>Z</i>)-Amino Alcohols via Imine Double Allylboration: Synthesis of <i>trans</i>-1,2,3,6-Tetrahydropyridines and Total Synthesis of Andrachcine
作者:Christophe Allais、William R. Roush
DOI:10.1021/acs.orglett.7b00995
日期:2017.5.19
A stereoselective synthesis of trans-1,2,3,6-tetrahydropyridines 8 is described. This synthesis proceeds via intramolecular Mistunobu reactions of 1,5-syn-(Z)-amino alcohols 7, which were prepared by a highly diastereo- and enantioselective double-allylboration reaction of aldehyde 5 and silylimine 6. The chiral bifunctional γ-borylallylborane 9E was generated in situ by hydroboration of allene 3 with
Convenient Access to Primary Amines by Employing the Barbier-Type Reaction of <i>N</i>-(Trimethylsilyl)imines Derived from Aromatic and Aliphatic Aldehydes
作者:Ferenc Gyenes、Kathryn E. Bergmann、John T. Welch
DOI:10.1021/jo971061r
日期:1998.5.1
A new versatile preparation of primary amines via benzylation of aromatic and aliphatic aldimines is described. Sonochemical and traditional methods for generation of the reactive intermediates are compared and contrasted. Competitive reactions were analyzed via free energy relationships to support the proposed alkylative mechanism.
Alkalimetall-i minoborate, ein neuartiger typ von bor-atkomplexen