Photocatalytic direct C–S bond formation: facile access to 3-sulfenylindoles via metal-free C-3 sulfenylation of indoles with thiophenols
作者:Wei Guo、Wen Tan、Mingming Zhao、Kailiang Tao、Lv-Yin Zheng、Yongquan Wu、Deliang Chen、Xiao-Lin Fan
DOI:10.1039/c7ra08086g
日期:——
An efficient and convenient photocatalytic direct C-3 sulfenylation of indoles with thiophenols has been developed for the construction of 3-sulfenylations. This protocol employs thiophenols as the sulfenylating agents, inexpensive rose bengal as the photocatalyst, and shows mild conditions, readily available starting materials, high atom and step atom economy, and environmental advantages. The representative
Visible/solar-light-driven thiyl-radical-triggered synthesis of multi-substituted pyridines
作者:Ashish Kumar Sahoo、Amitava Rakshit、Avishek Pan、Hirendra Nath Dhara、Bhisma K. Patel
DOI:10.1039/d3ob00009e
日期:——
light-triggered synthesis of thio-functionalized pyridines is demonstrated using γ-ketodinitriles, thiols, and eosin Y as the photocatalyst. The reaction proceeds via the selective attack on one of the cyano groups by an in situ generated thiyl radical. The reaction also proceeds with nearly equal efficiency using direct sunlight. Large-scale synthesis and a few useful synthetic transformations of the substituted
使用 γ-酮二腈、硫醇和曙红 Y 作为光催化剂,证明了光触发合成硫代功能化吡啶。反应通过原位生成的硫自由基选择性攻击其中一个氰基进行。利用直射阳光,反应也能以几乎相同的效率进行。还进行了取代吡啶的大规模合成和一些有用的合成转化。