An efficient metal-free C–H sulfenylation process at the C2 position of non-protected indoles has been developed.
一种高效的无金属C-H砜基化过程已经在非保护吲哚的C2位置上开发出来。
Direct Bis-Alkyl Thiolation for Indoles with Sulfinothioates under Pummerer-Type Conditions
作者:Peng Qi、Fang Sun、Ning Chen、Hongguang Du
DOI:10.1021/acs.joc.1c02502
日期:2022.1.21
applications. This approach enabled double C–H thiolation at the C2 and C3 of the indole in one pot. The mechanism studies suggested the thiolation was realized through the sulfoxonium salt rather than sulfenylcarboxylate.
Study on direct benzoannelations of pyrrole and indole systems by domino reactions with 4,5-dicyanopyridazine
作者:Donatella Giomi、Marco Cecchi
DOI:10.1016/s0040-4020(02)00958-4
日期:2002.9
The title pyridazine 1 was found to undergo hetero Diels–Alder [4+2] cycloadditions on the C(2)–C(3) double bond of pyrrole and indole systems; spontaneous loss of nitrogen from the primary adducts, followed by oxidation processes, afforded the corresponding fully aromatic benzoannelated skeletons in modest and reasonable yields, respectively. Competitive attacks of the same systems at the strongly
Plate, Ralf; Ottenheijm, Harry C. J., Tetrahedron, 1986, vol. 42, # 16, p. 4510 - 4516
作者:Plate, Ralf、Ottenheijm, Harry C. J.
DOI:——
日期:——
Nonreductive Desulfenylation of 3-Indolyl Sulfides. Improved Syntheses of 2-Substituted Indoles and 2-Indolyl Sulfides
作者:Pierre Hamel、Nicolas Zajac、Joseph G. Atkinson、Yves Girard
DOI:10.1021/jo00100a045
日期:1994.10
Desulfenylation of 3-indolyl sulfides to the corresponding 3-unsubstituted indoles is usually carried out under reductive conditions, thus accommodating only substituents which are resistant to reduction. We have developed a nonreductive procedure for removal of a sulfide at the 3-position of indoles, using trifluoroacetic acid in the presence of a thiol as trapping agent, which is compatible with a large array of functionalities on the indole ring. In addition, the desulfenylation occurs selectively at the 3-position of the indole, and sulfide groups at other positions of the molecule remain untouched. Thus, indole 2,3-bis-sulfides are selectively desulfenylated at the 3-position, affording 3-unsubstituted 2-indolyl sulfides. This methodology broadens the use of sulfide as a protecting group for the 3-position of indoles.