Copper-Catalyzed Stereospecific C–S Coupling Reaction of Enantioenriched Tertiary Benzylic Amines via in Situ Activation with Methyl Triflate
作者:Wenlong Jiang、Nutao Li、Lihong Zhou、Qingle Zeng
DOI:10.1021/acscatal.8b03032
日期:2018.11.2
1-(thiophen-2-yl)ethanamine), and aminoacid esters containing a benzylamine moiety, are highly efficient substrates, and their chirality is efficiently transferred to the products (94–99% ee). The absolute configurations of the products are predictable and follow the pattern of SN2-type substitutions; an inversion of the absolute configuration of the tertiary amines occurs during the C–S coupling reaction. Not only
Zn- and Cu-Catalyzed Coupling of Tertiary Alkyl Bromides and Oxalates to Forge Challenging C–O, C–S, and C–N Bonds
作者:Yuxin Gong、Zhaodong Zhu、Qun Qian、Weiqi Tong、Hegui Gong
DOI:10.1021/acs.orglett.0c04206
日期:2021.2.5
We describe here the facile construction of sterically hindered tertiary alkyl ethers and thioethers via the Zn(OTf)2-catalyzed coupling of alcohols/phenols with unactivated tertiary alkyl bromides and the Cu(OTf)2-catalyzed thiolation of unactivated tertiary alkyloxalates with thiols. The present protocol represents one of the most effective unactivated tertiary C(sp3)–heteroatom bond-forming conditions
nickel-catalyzed oxidative dehydrogenative coupling reaction of alkane with thiol for the construction of C(sp3)-S bond has been established, affording more than 50 alkyl thioethers. Notably, pharmaceutical and agrochemicals, such as Provigil, Chlorbenside and Pyridaben, were readily synthesized by this approach. The sterically hindered ligand BC and disulfide which was formed in situ oxidation of thiol, efficiently
Highly Efficient and Chemoselective Tertiary and Secondary Benzylation of Thiols Catalyzed by Indium(III) Triflate
作者:Krzysztof Kuciński、Grzegorz Hreczycho
DOI:10.1002/ejoc.201701007
日期:2017.10.10
We have developed a highly efficient method for the chemoselective nucleophilicsubstitution of tertiary and secondary benzylic alcohols with aliphatic and aromatic thiols in the presence of catalytic amounts of indium(III) triflate under mild conditions. A broad range of unsymmetrical sulfides were synthesized in excellent isolated yields (89–99 %) by using this approach.