One-pot multi-step cascade protocols toward β-indolyl sulfoximidoyl amides <i>via</i> intermolecular trapping of an α-indolylpalladium complex by CO
作者:Huahua Liu、Li Wei、Zhiyuan Chen
DOI:10.1039/d1ob00128k
日期:——
were efficiently prepared from ortho-iodoanilines, propargyl bromides, 1 atm of CO, and substituted NH-sulfoximines, through a palladium-catalyzed indole annulation/carbonyl insertion/C–N bond formation cascade. Mostly good to high yields of the products were obtained through this multi-step, one-pot reaction protocol under very gentle reactionconditions. The obtained β-indolyl sulfoximidoyl amides could
通过钯催化的吲哚环化/羰基插入/C-N 键形成级联反应,由邻碘苯胺、炔丙基溴、1 atm CO 和取代的N H-亚砜亚胺有效地制备了各种 β-吲哚亚磺酰亚胺酰胺。在非常温和的反应条件下,通过这种多步骤、一锅法反应方案获得了大部分好到高产率的产物。获得的 β-吲哚亚磺酰亚胺酰胺可以转化为含有色胺部分的具有生物学意义的亚砜亚胺类似物。
Asymmetric Domino Heck/Dearomatization Reaction of β-Naphthols to Construct Indole–Terpenoid Frameworks
A palladium-catalyzed enantioselective Heck cyclization/dearomatization cascade via capturing the cyclized Heck π-allylpalladium intermediate by β-naphthols is reported, which provides a new strategy for the construction of chiral indole–terpenoid frameworks. This method affords indole-functionalized β-naphthalenone compounds bearing an all-carbon-substituted quaternary chiral center in excellent yields
Abstract A palladium-catalyzed regioselective three-component cascade reaction of carbondioxide, amines and allenes has been developed, providing an expedient and practical method for the construction of a range of functionalized carbamates containing dihydrobenzofuran or indole moiety in moderate to excellent yields. The broad substrate scope, good functional group tolerance and excellent chemo-
Regiodivergent cascade cyclization/alkoxylation of allenamides <i>via</i> N-protecting group driven rearrangement to access indole and indoline derivatives
作者:Dhananjay Chaudhary、Suman Yadav、Naveen Kumar Maurya、Dharmendra Kumar、Km Ishu、Malleswara Rao Kuram
DOI:10.1039/d2cc03174d
日期:——
tethered allenamides is described, providing regiodivergent indole and indoline derivatives controlled by the N-protecting group. This room temperature reaction provided a functionalizable olefinic moiety with broad substrate scope. Preliminary mechanistic studies support the rearrangement of an indoline-derived intermediate to indoles with the N-acetyl allenamides forming free (NH) indoles.