Extremely high enantioselectivity (>99.5% ee) and chemical yield (>99%) are achieved in an asymmetric autocatalytic reaction. A (5-pyrimidyl)alkanol with a tert-butylethynyl group at its 2-position (1) is a very efficient asymmetric autocatalyst in the enantioselective alkylation in Equation (1).
Structural Contributions to Autocatalysis and Asymmetric Amplification in the Soai Reaction
作者:Soumitra V. Athavale、Adam Simon、K. N. Houk、Scott E. Denmark
DOI:10.1021/jacs.0c05994
日期:2020.10.28
autocatalysis, providing insights into the role played by reactant and alkoxide structure. The alkynyl substituent favorably tunes catalyst solubility, aggregation, and conformation while modulating substrate reactivity and selectivity. The alkyl groups and the heteroaromatic core play further complementary roles in catalyst aggregation and substrate binding. In the study of these structure-activity relationships
Reflections on spontaneous asymmetric synthesis by amplifying autocatalysisThis is one of a number of contributions from the current members of the Dyson Perrins Laboratory to mark the end of almost 90 years of organic chemistry research in that building, as all its current academic staff move across South Parks Road to a new purpose-built laboratory.
作者:Ilya D. Gridnev、Joerg M. Serafimov、Harry Quiney、John M. Brown
DOI:10.1039/b307382n
日期:——
Spontaneous generation of chirality was observed in the course of studying the mechanism of asymmetricautocatalysis by NMR in ZnR2 alkylation of pyrimidin-5-aldehydes. A systematic study was carried out in order to discover its origins. Even in clean fresh non-glass reaction vessels spontaneous ee was clearly observed, and was not dependent on any single reaction parameter. For comparison it was demonstrated