13141-39-4Relevant articles and documents
Alkanethiol-Mediated Cyclization of o-Alkynylisocyanobenzenes: Synthesis of Bis-Thiolated Indole Derivatives
La-Ongthong, Kannika,Naweephattana, Phiphop,Khaikate, Onnicha,Surawatanawong, Panida,Soorukram, Darunee,Pohmakotr, Manat,Reutrakul, Vichai,Leowanawat, Pawaret,Kuhakarn, Chutima
, p. 6338 - 6351 (2020/07/21)
Reactions of o-alkynylisocyanobenzenes with a variety of alkanethiols (Alk-SH) provide 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 calculations on the electronic structures and relative free energies of 5-exo and 6-endo cyclization pathways support that the 5-exo cyclization is preferable.
Azide-Triggered Bicyclization of o-Alkynylisocyanobenzenes: Synthesis of Tetrazolo[1,5-a]quinolines
Khaikate, Onnicha,Soorukram, Darunee,Leowanawat, Pawaret,Pohmakotr, Manat,Reutrakul, Vichai,Kuhakarn, Chutima
, p. 7050 - 7057 (2019/11/11)
An efficient and rapid synthetic approach for the synthesis of tetrazolo[1,5-a]quinolines has been developed employing the reaction of o-alkynylisocyanobenzenes with sodium azide. The present strategy involved nucleophilic addition of azide to isocyanide followed by 6-endo cyclization. The reaction gives access to a collection of tetrazolo[1,5-a]quinolines with broad functional group in moderate to high yields under metal-, and base-free conditions.
Sulfinates and thiocyanates triggered 6-endo cyclization of o-alkynylisocyanobenzenes
Khaikate, Onnicha,Meesin, Jatuporn,Pohmakotr, Manat,Reutrakul, Vichai,Leowanawat, Pawaret,Soorukram, Darunee,Kuhakarn, Chutima
supporting information, p. 8553 - 8558 (2018/12/01)
Diverse 2-sulfonyl- and 2-thiocyanato-3-substituted quinolines were synthesized from o-alkynylisocyanobenzenes by nucleophilic addition of the respective sulfinate sodium salts and ammonium thiocyanate to the isocyanide moiety followed by cyclization. The salient features of the methodology include metal-free, ambient temperature and mild reaction conditions, ease of reagent handling, and broad functional group tolerance.