Synthesis of Isoquinuclidines from Highly Substituted Dihydropyridines via the Diels–Alder Reaction
作者:Rhia M. Martin、Robert G. Bergman、Jonathan A. Ellman
DOI:10.1021/ol303040r
日期:2013.2.1
A stereo- and regioselective Diels–Alderreaction for the synthesis of highly substituted isoquinuclidines from dihydropyridines and electron-deficient alkenes has been developed. While reactions with activated dienophiles proceed readily under thermal conditions, the use of Lewis acid additives is necessary to facilitate cycloadditions for less reactive alkenes. This procedure affords the target compounds
Regio‐ and Stereoselective Synthesis of Fully Substituted Silyl Enol Ethers of Ketones and Aldehydes in Acyclic Systems
作者:Peter‐Yong Wang、Guillaume Duret、Ilan Marek
DOI:10.1002/anie.201909089
日期:2019.10.14
The regio- and stereoselective preparation of fully substituted and stereodefined silylenolethers of ketones and aldehydes through an allyl-Brook rearrangement is reported. This fast and efficient method proceeds from a mixture of E and Z isomers of easily accessible starting materials.
Another Role of Copper in the Simmons–Smith Reaction: Copper-catalyzed Nucleophilic Michael-type Cyclopropanation of α,β-Unsaturated Ketones
作者:Kanami Fujii、Tomonori Misaki、Takashi Sugimura
DOI:10.1246/cl.131193
日期:2014.5.5
Cyclopropanation was performed using the Furukawa procedure with CH2I2/Et2Zn and α,β-unsaturated ketones. The reaction was performed in the presence of a copper salt. The reactivity was highly depe...