Chiralimidodiphosphoric acid-catalysed asymmetric functionalization of 3-hydroxy bisindoles was established. Sulfur-containing groups could be successfully introduced into isatin frameworks using commercially available thiols. The transformation was compatible with substrates bearing distinct substituents, both aromatic and aliphatic thiols were amenable to afford the desired products. A total of
An efficient and practical method for synthesis of C2‐phosphorylated indoles has been disclosed via a metal‐free 1,2‐phosphorylation of 3‐indolylmethanols with H‐phosphine oxides or H‐phosphonates. This alternative protocol features a broad substrate scope with respect to both 3‐indolylmethanols derived from isatins, acyclic α‐keto amide, α‐keto ester, 1,2‐diketone and simple ketones and H‐phosphine
Catalytic Asymmetric Arylation of 3-Indolylmethanols: Enantioselective Synthesis of 3,3′-Bis(indolyl)oxindoles with High Atom Economy
作者:Xiao-Xue Sun、Bai-Xiang Du、Hong-Hao Zhang、Lei Ji、Feng Shi
DOI:10.1002/cctc.201500093
日期:2015.4.7
catalyticenantioselectivesynthesis of 3,3′‐bis(indolyl)oxindoles, which is applicable to a wide range of substrates, yielding a series of chiral 3,3′‐bis‐ (indolyl)oxindoles with structural diversity. Control experiments demonstrated that the NH group in the indole moiety of 3‐indolylmethanol is important in obtaining good enantioselectivity, whereas the NH group of 3‐methylindole plays a crucial
Highly diastereo- and enantioselective construction of a spiro[cyclopenta[b]indole-1,3′-oxindole] scaffold via catalytic asymmetric formal [3+2] cycloadditions
作者:Wei Tan、Xin Li、Yu-Xin Gong、Meng-Di Ge、Feng Shi
DOI:10.1039/c4cc07246d
日期:——
An organocatalyticasymmetricformal [3+2] cycloaddition of isatin-derived 3-indolylmethanol with 3-methyl-2-vinylindole has been established, leading to highly stereoselective construction of a spiro[cyclopenta[b]indole-1,3'-oxindole] scaffold with the concomitant creation of three contiguous stereogenic centers (72-99% yield, all >95 : 5 dr, 90-98% ee), one of which is an all-carbon quaternary stereogenic
Catalyst-Controlled Chemoselective Reaction of 3-Indolylmethanols with Cyclic Enaminones Leading to C2-Functionalized Indoles
作者:Xin Li、Wei Tan、Yu-Xin Gong、Feng Shi
DOI:10.1021/jo502782b
日期:2015.2.6
A catalyst-controlledchemoselective formal 1,2-addition of 3-indolylmethanols with cyclic enaminones has been established in the presence of TfOH as a strong acid, which afforded C2-functionalized indole derivatives in generally good yields (up to 89% yield). This reaction not only confronted the great challenge in 1,2-addition of 3-indolylmethanols but also provided a good strategy for C2-functionalization