Kinetic Resolution of Nitrogen Heterocycles with a Reusable Polymer-Supported Reagent
作者:Imants Kreituss、Yuta Murakami、Michael Binanzer、Jeffrey W. Bode
DOI:10.1002/anie.201204991
日期:2012.10.15
Shake it up baby! Simply shaking a polymer‐supported reagent and the racemic amine at room temperature kinetically resolves a broad range of N‐heterocycles with good selectivity. The polymer‐supported reagents are robust, easy to regenerate, and can be reused dozens of times. Cleavable acyl groups can be used to give access to both amine enantiomers in a single resolution.
7-Oxo-4,7-dihydrothieno[3,2-b]pyridine-6-carboxamides: Synthesis and biological activity of a new class of highly potent inhibitors of human cytomegalovirus DNA polymerase
作者:Scott D. Larsen、Zhijun Zhang、Brian A. DiPaolo、Peter R. Manninen、Douglas C. Rohrer、Michael J. Hageman、Todd A. Hopkins、Mary L. Knechtel、Nancee L. Oien、Bob D. Rush、Francis J. Schwende、Kevin J. Stefanski、Janet L. Wieber、Karen F. Wilkinson、Kathyrn M. Zamora、Michael W. Wathen、Roger J. Brideau
DOI:10.1016/j.bmcl.2007.05.010
日期:2007.7
We report a new class of non-nucleoside antivirals, the 7-oxo-4,7-dihydrothieno[3,2-b]pyridine-6-carboxamides, some of which possess remarkable potency versus a broad spectrum of herpesvirus DNApolymerases and excellent selectivity compared to human DNApolymerases. A critical factor in the level of activity is hypothesized to be conformational restriction of the key 2-aryl-2-hydroxyethylamine sidechain
Catalytic Asymmetric Synthesis of Substituted Morpholines and Piperazines
作者:Huimin Zhai、Andrey Borzenko、Ying Yin Lau、Shin Hye Ahn、Laurel L. Schafer
DOI:10.1002/anie.201206826
日期:2012.12.3
Under two conditions: Hydroamination catalyzed by group 4 metals is featured in the modular and enantioselective synthesis of 3‐substitutedmorpholines and the diastereoselective synthesis of 2,5‐substitutedpiperazines.
Catalytic Kinetic Resolution of Cyclic Secondary Amines
作者:Michael Binanzer、Sheng-Ying Hsieh、Jeffrey W. Bode
DOI:10.1021/ja209472h
日期:2011.12.14
The catalytic resolution of racemic cyclic amines has been achieved by an enantioselective amidation reaction featuring an achiral N-heterocyclic carbene catalyst and a new chiral hydroxamic acid cocatalyst working in concert. The reactions proceed at room temperature, do not generate nonvolatile byproducts, and provide enantioenriched amines by aqueous extraction.
Expanded substrate scope and catalyst optimization for the catalytic kinetic resolution of N-heterocycles
作者:Sheng-Ying Hsieh、Michael Binanzer、Imants Kreituss、Jeffrey W. Bode
DOI:10.1039/c2cc34907h
日期:——
The scope, reactivity, and selectivity of the chiral hydroxamic acid-catalyzed kinetic resolution of chiral amines are improved by a new catalyst structure and a more environmentally friendly reaction protocol. In addition to increasing selectivity across all substrates, these conditions make possible the resolution of N-heterocycles containing lactams or other basic functional groups that can inhibit the catalyst.