Regioselective Cobalt(II) Catalyzed C–H Functionalization and [3 + 2] Annulation of N-Arylguanidines with 1,3-Diynes
作者:Harish Parihar、Pooja Yadav、Natesan Thirupathi
DOI:10.1021/acs.joc.3c02252
日期:2024.6.7
8-Quinolinyl directed N-arylguanidines were subjected to cobalt(II) catalyzedC–H functionalization/1,3-diyne annulation under mild conditions to afford 40 alkynylated indole guanidines in 34% to 92% yields. The scope of the substrates was explored. The reported procedure is mostly regioselective and tolerates various functional groups in the substrates. The regioselectivity of the reactions was assessed
在温和条件下,对 8-喹啉基导向的N-芳基胍进行钴 (II) 催化的 C-H 官能化/1,3-二炔环化,得到 40 种炔基化吲哚胍,产率为 34% 至 92%。探索了底物的范围。报道的程序主要是区域选择性的并且耐受底物中的各种官能团。借助多核核磁共振波谱和 X 射线晶体学评估了反应的区域选择性。进行了竞争和标签实验来支持所提出的机制。
PHOTO-ALIGNMENT FILM AND LIQUID CRYSTAL DISPLAY ELEMENT
申请人:TAMURA NORIO
公开号:US20070232780A1
公开(公告)日:2007-10-04
[Object] To obtain an alignment film having excellent alignment stability of a liquid crystal and a high voltage holding ratio by application of linearly polarized light to a polyamic acid having a specific structure and then imidization under heat. [Solving Means] A photo-alignment film is obtained by: applying a polyamic acid solution on a substrate, where the polyamic acid contains, in its main chain, at least a group having unsaturated groups having 1 to 3 carbon-carbon double bonds or 1 to 4 triple bonds; vaporizing a solvent from a film formed; applying linearly polarized light to the film after the vaporization of the solvent; and then heating the film to imidize the polyamic acid.