Diastereofacial selectivity in intermolecular nitrone cycloadditions to chiral allyl ethers. Application to Chiral Synthesis of Coniine
作者:Masayuki Ito、Masae Maeda、Chihiro Kibayashi
DOI:10.1016/0040-4039(92)80019-g
日期:1992.6
The intermolecular cycloadditions of a cyclic nitrone to chiral allyl ethers take place with erythro selectivity, where the degree of selectivity achieved is dependent upon the size of the alkyl substituent attached to the allylic chiral center, and these reactions are applied to the synthesis of optically active alkaloid coniine.
An alternative enantioselective total synthesis of (+)-monomorine I
作者:Masayuki Ito、Chihiro Kibayashi
DOI:10.1016/s0040-4039(00)97807-9
日期:1990.1
An alternative enantioselective total synthesis of (+)-monomorine I has been achieved, based on asymmetric nitrone cycloaddition using a chiral allyl ether.
Enantioselective Allylic Etherification: Selective Coupling of Two Unactivated Alcohols
作者:Markus Roggen、Erick M. Carreira
DOI:10.1002/anie.201007716
日期:2011.6.6
An Ir(P,alkene) complex catalyzes the enantioselectiveallylicetherification of unactivated secondary allylicalcohols. Useful levels of enantioselectivity and yield were achieved with this operationally easy and robust protocol. Initial kinetic studies indicate a significant rate difference for the substrate enantiomers, allowing for a resolution process. cod=1,5‐cyclooctadiene