Highly Diastereoselective and Enantiospecific Allylation of Ketones and Imines Using Borinic Esters: Contiguous Quaternary Stereogenic Centers
作者:Jack L.-Y. Chen、Varinder K. Aggarwal
DOI:10.1002/anie.201407127
日期:2014.10.6
allylic boronic esters are not sufficiently reactive to react with ketones and imines. However, they can be converted into the corresponding borinicesters by the sequential addition of nBuLi and TFAA. These reactive intermediates possess the perfect balance between reactivity and configurational stability. Their enhanced reactivity allows the highly selective allylation of both ketones and ketimines
Mu opioid receptor ligands: methods of use and synthesis
申请人:Harrison Bryce A.
公开号:US20090093534A1
公开(公告)日:2009-04-09
Novel compounds and compositions including those compounds, as well as methods of using and making the compounds are herein described. The compounds are useful in therapeutic applications, including modulation of disease or disease symptoms in a subject (e.g., mammal, human, dog, cat, horse). The compounds are useful as modulators of the mu opioid receptor (MOR) through their binding affinity with that receptor.
Stereoselective nitrile oxide cycloadditions to chiral allyl ethers and alcohols. The inside alkoxy effect
作者:K. N. Houk、Susan R. Moses、Yun Dong Wu、Nelson G. Rondan、Volker Jager、R. Schohe、Frank R. Fronczek
DOI:10.1021/ja00325a040
日期:1984.6
Asymmetric dihydroxylation of vinyl and allylsilanes
作者:John A. Soderquist、Anil M. Rane、Carlos J. López
DOI:10.1016/s0040-4039(00)91956-7
日期:1993.3
Representative vinyl and allylsilanes were efficiently converted to the corresponding optically active vicinal diols with the Os-catalyzed Sharpless asymmetric dihydroxylation. The enantiomeric excess achieved ranged widely from 6-88% with the trans alkenes providing the best substrates for asymmetric induction.
Carbon-centered optically active organosilanes. A rational approach to an efficient silylated chiral auxiliary