MARSAIS, F.;GRANGER, P.;QUEGUINER, G., J. ORG. CHEM., 1981, 46, N 22, 4494-4497
作者:MARSAIS, F.、GRANGER, P.、QUEGUINER, G.
DOI:——
日期:——
Enantioselective Alkylation of 2-Alkylpyridines Controlled by Organolithium Aggregation
作者:Joshua J. Gladfelder、Santanu Ghosh、Maša Podunavac、Andrew W. Cook、Yun Ma、Ryan A. Woltornist、Ivan Keresztes、Trevor W. Hayton、David B. Collum、Armen Zakarian
DOI:10.1021/jacs.9b08659
日期:2019.9.25
pyridines provides access to chiral pyridines via an opera- tionally simple protocol that obviates the need for prefunc- tionalization or preactivation of the substrate. The alkylation is accomplished using chiral lithium amides as non-covalent stereodirecting auxiliaries. Crystallographic and solution NMR studies provide insight into the structure of well- defined chiral aggregates in which a lithium