A visible-light-induced oxidativecoupling of diselenides with readily available vinylarenes is demonstrated. This benign protocol allows one to access a wide range of α-aryl and α-alkyl selenomethyl ketones in good yields with excellent functional group compatibility. The distinct advantages of this protocol over all previous methods include the use of a green solvent and air as an oxidant and the
Calcium(II)-Mediated Three-Component Selenofunctionalization of Alkenes under Mild Conditions
作者:Minyao Kuang、Haoran Li、Zhongyi Zeng、Hui Gao、Zhi Zhou、Xujia Hong、Wei Yi、Shengdong Wang
DOI:10.1021/acs.orglett.3c03197
日期:2023.11.17
A mild and general protocol involving amnio- and oxyselenation of diverse alkenes for the efficient synthesis of organo-Se compounds is achieved via an environmentally benign calcium-catalyzed three-component reaction. This selenofunctionalization reaction exhibits excellent substrate/functional group tolerance and high levels of chemo- and regioselectivity. Its utility was exemplified in the late-stage
Resorting to suitable methods, a wide variety of alpha-phenylselanyl imines 2-5 were prepared from alpha-phenylselanyl aldehydes and alpha-phenylselanyl ketones 1. These compounds were reduced to afford beta-phenylselanyl amines 6-9. Our experimental conditions have limited the well known deselenenylation side-reaction occurring with most hydrides. On the other hand, the reaction of alpha-phenylselanyl imines 2 with organometallics led to the expected addition products only in the case of allylated derivatives. Depending on the temperature, either alpha-phenylselanyl amines 11 or unexpected allylaziridines 12 were recovered. (C) 2004 Elsevier Ltd. All rights reserved.