Enantioselective Organocatalytic Intramolecular Aza-Michael Reaction: a Concise Synthesis of (+)-Sedamine, (+)-Allosedamine, and (+)-Coniine
作者:Santos Fustero、Diego Jiménez、Javier Moscardó、Silvia Catalán、Carlos del Pozo
DOI:10.1021/ol702447y
日期:2007.12.1
ee's when Jorgensen catalyst IV was used in the process, giving rise to the enantioselective formation of several five- and six-membered heterocycles. The developed methodology was applied to the synthesis of three piperidine alkaloids.
Improved Protocol for Asymmetric, Intramolecular Heteroatom Michael Addition Using Organocatalysis: Enantioselective Syntheses of Homoproline, Pelletierine, and Homopipecolic Acid
作者:Erik C. Carlson、Lauren K. Rathbone、Hua Yang、Nathan D. Collett、Rich G. Carter
DOI:10.1021/jo800749t
日期:2008.7.1
indoline, and piperidine rings using an organocatalyzed, intramolecular heteroatom Michael addition is described. Application to the enantioselective synthesis of homoproline, homopipecolic acid, and pelletierine has been accomplished.
Enantioselective Synthesis of Piperidines through the Formation of Chiral Mixed Phosphoric Acid Acetals: Experimental and Theoretical Studies
作者:Zhankui Sun、Grace A. Winschel、Paul M. Zimmerman、Pavel Nagorny
DOI:10.1002/anie.201405128
日期:2014.10.13
of unsaturated acetals has been utilized for the synthesis of functionalized chiral piperidines. The chiral enol ether products of these cyclizations undergo subsequent in situ enantioenrichment through acetalization of the minor enantiomer. A new computational reaction exploration method was utilized to elucidate the mechanism and stereoselectivity of this transformation. Rather than confirming the