Alkanethiol-Mediated Cyclization of <i>o</i>-Alkynylisocyanobenzenes: Synthesis of Bis-Thiolated Indole Derivatives
作者:Kannika La-ongthong、Phiphop Naweephattana、Onnicha Khaikate、Panida Surawatanawong、Darunee Soorukram、Manat Pohmakotr、Vichai Reutrakul、Pawaret Leowanawat、Chutima Kuhakarn
DOI:10.1021/acs.joc.0c00003
日期:2020.5.15
the corresponding bis-thiolated indole derivatives. The advantages of the reaction include metal-free, room-temperature, mild reaction conditions and broad functional group compatibility. The reaction proceeds via nucleophilic addition of an alkanethiol to an isonitrile moiety, 5-exo cyclization, followed by nucleophilic addition of an alkanethiol to a 3-alkylidene indole intermediate. Density functional
邻炔基异氰基苯与各种链烷硫醇(Alk-SH)的反应提供了相应的双硫醇化吲哚衍生物。该反应的优点包括无金属,室温,温和的反应条件和广泛的官能团相容性。该反应通过将烷硫醇亲核加成到异腈部分,进行5-exo环化,然后将烷硫醇亲核加成到3-亚烷基吲哚中间体而进行。对5-exo和6-endo环化路径的电子结构和相对自由能的密度泛函计算支持优选5-exo环化。