Rhodium-catalyzed denitrogenative <i>gem</i>-difunctionalization of pyridotriazoles with thioesters: formal carbene insertion into C(O)–S bonds
作者:Zhe Gao、Di Jiang、Bin Li、Baiquan Wang
DOI:10.1039/d1cc06041d
日期:——
A formalcarbeneinsertion into C(O)–S bonds to access α-quaternary pyridines was achieved via a rhodium(II)-catalyzed in situ formation of sulfonium ylides from pyridotriazoles with thioesters followed by acyl group migration. This protocol has enabled an efficient denitrogenative gem-acylthiolation of pyridotriazoles to incorporate an acyl, pyridyl, and sulfur-substituted quaternary carbon center
通过铑( II )催化从吡啶三唑与硫酯原位形成锍叶立德,随后酰基迁移,实现了正式的卡宾插入C(O)-S键以接近α-季吡啶。该协议使吡啶三唑的高效脱氮宝石-酰基硫醇化能够结合酰基、吡啶基和硫取代的季碳中心,具有高选择性、广泛的底物范围和良好的官能团耐受性。
S-Acetylation of Thiols Mediated by Triflic Acid: A Novel Route to Thioesters
作者:Krzysztof Kuciński、Grzegorz Hreczycho
DOI:10.1021/acs.oprd.7b00378
日期:2018.4.20
and aliphatic thiols using isopropenyl acetate as a cheap and convenient acetylating agent. During our tests, we also investigated the differences between the activities of metal triflates and triflic acid as catalysts in the acetylation of thiols. Finally, the potential of our concept has been increased by the implementation of Nafion as a heterogeneous catalyst for S-acetylation of thiols.