Visible-Light-Induced C–H Bond Aminoalkylation of Heterocycles by the Decarboxylation Coupling of Amino Acids
作者:Yifan Li、Changhui Dai、Shentong Xie、Ping Liu、Peipei Sun
DOI:10.1021/acs.orglett.1c02014
日期:2021.8.6
An efficient visible-light-induced decarboxylative coupling reaction of N-protecting α-amino acids with heterocycles for the generation of aminoalkylated heterocycles is presented. A series of aminoalkylated heterocycles were obtained in moderate to good yields. Attractive features of this process include the generation of aminomethyl radical by an inexpensive organic photocatalyst under transition-metal-free
Photoredox‐Mediated Reaction of
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‐Diborylalkenes: Reactivity Toward Diverse 1,1‐Bisborylalkanes
作者:Nivesh Kumar、Nadim Eghbarieh、Tamar Stein、Alexander I. Shames、Ahmad Masarwa
DOI:10.1002/chem.202000603
日期:2020.4.24
The use of gem-diborylalkenes as radical-reactive groups is explored for the first time. These reactions provide an efficient and general method for the photochemicalconversion of gem-diborylalkenes to rapidly access 1,1-bisborylalkanes. This method exploits a novel photoredox decarboxylative radical addition to gem-diborylalkenes to afford α-gem-diboryl carbon-centered radicals, which benefit from
Hetero-oligomeric PNAs consisting of new monomeric building blocks and various amounts of N-(2-aminoethyl) glycine have been synthesized by solid-phase chemistry. Some of these new compounds show stronger binding to complementary DNA than the original PNAs, and are consequently very interesting candidates as antisense compounds for applications in therapy and in diagnostics. (C) 1997 Elsevier Science Ltd.