Copper-catalyzed one-pot synthesis of α-functionalized imidates
作者:Ralph Husmann、Yun S. Na、Carsten Bolm、Sukbok Chang
DOI:10.1039/c0cc00941e
日期:——
A four-component, one-pot procedure gives access to α-functionalized imidates starting from readily available terminal alkynes, sulfonyl azides, alcohols and nitroalkenes using a copper catalyst and triethylamine as a base under mild conditions.
Organocatalytic asymmetric allylic alkylation of sulfonylimidates with Morita-Baylis-Hillman carbonates
作者:Jing Peng、HaiLei Cui、YingChun Chen
DOI:10.1007/s11426-010-4137-2
日期:2011.1
The asymmetric allylic alkylation reaction of sulfonylimidates with various Morita-Baylis-Hillman (MBH) carbonates was accomplished by the catalysis of commercially available cinchonaalkaloids catalyst (DHQD)2AQN. The corresponding allylic alkylation products were obtained in good yields with high stereoselectivities (up to 99% ee, 89:11 dr).
alpha-Aryl beta-hydroxy imidates are efficiently obtained by the four-component reaction of ethyl glyoxylates, aryl acetylenes, sulfonyl azides, and alcohols using a copper catalyst. The developed procedure Is characterized by high selectivity, mild reaction conditions, a wide substrate scope, and an excellent functional group tolerance. Facile transformations of the obtained sulfonylimidate moiety to other carbonyl groups such as sulfonamides or esters were also demonstrated.