Synthesis of substituted γ-lactam via Pd(0)-catalyzed cyclization of alkene-tethered carbamoyl chloride
摘要:
Pd(0)-catalyzed carboiodonation of but-3-enylcarbamic chloride has been developed with NaI as additive, which provides a ready access to substituted gamma-lactam bearing an alkyl iodide group. This reaction features alkyl iodide reductive elimination as a key step in catalytic cycle, indicating the crucial role of additive NaI. (C) 2014 Elsevier Ltd. All rights reserved.
Synthesis of substituted γ-lactam via Pd(0)-catalyzed cyclization of alkene-tethered carbamoyl chloride
摘要:
Pd(0)-catalyzed carboiodonation of but-3-enylcarbamic chloride has been developed with NaI as additive, which provides a ready access to substituted gamma-lactam bearing an alkyl iodide group. This reaction features alkyl iodide reductive elimination as a key step in catalytic cycle, indicating the crucial role of additive NaI. (C) 2014 Elsevier Ltd. All rights reserved.
Palladium‐Catalyzed Carbamoyl‐Carbamoylation/ Carboxylation/Thioesterification of Alkene‐Tethered Carbamoyl Chlorides Using Mo(CO)
<sub>6</sub>
as the Carbonyl Source
ation/thioesterification of alkene-tethered carbamoyl chlorides using Mo(CO)6 as the carbonyl source. The reactions were typically performed with good functional group compatibility and tolerated different nucleophiles (amines, alcohols, phenols, thiols and water), which provided a newaccess to amidated/esterificated/thioesterificated/carboxylated oxindoles or lactams bearing an all-carbon quaternary
我们报道了使用 Mo(CO) 6作为羰基源的烯烃系链氨基甲酰氯的钯催化的氨基甲酰-氨基甲酰化/羧化/硫酯化。该反应通常以良好的官能团相容性和耐受不同的亲核试剂(胺、醇、酚、硫醇和水)进行,这为获得酰胺化/酯化/硫酯化/羧化羟吲哚或内酰胺提供了新途径无 CO 气体条件。此外,天然产物突变和不同的后期衍生化是重要的实用特征。
Palladium-catalyzed asymmetric carbamoyl-carbonylation of alkenes
作者:Ziwen Feng、Qiuyu Li、Long Chen、Hequan Yao、Aijun Lin
DOI:10.1007/s11426-021-9992-2
日期:2021.8
carbamoyl-carbonylation of tethered alkenes with CO and alcohols has been developed. This reaction provided an efficient route to access oxindoles and γ-lactams bearing β-carbonyl substituted quaternary carbons in good yields with excellent chemo-, regio- and enantioselectivity. Gram-scale synthetic capability and facile transformations of the products to chiral spirooxindole and other functional molecules
已经开发出一种前所未有的钯催化不对称氨基甲酰基羰基化烯烃与 CO 和醇的反应。该反应提供了一种以良好的收率和优异的化学选择性、区域选择性和对映选择性获得含β-羰基取代季碳的羟吲哚和γ-内酰胺的有效途径。产物的克级合成能力和向手性螺吲哚和其他功能分子的轻松转化进一步说明了该反应的实用性。
Palladium-catalyzed Heck-carbonylation of alkene-tethered carbamoyl chlorides with aryl formates
We report a palladium-catalyzed Heck-carbonylation of alkene-tethered carbamoyl chlorides by utilizing aryl formates as convenient CO surrogates. One C–O and two C–C bonds are constructed to give diversiform esterified oxindoles/γ-lactams bearing an all-carbon quaternary stereocenter under gas-free conditions. This transformation features a wide substrate scope and good functional group tolerance and
我们报道了利用芳基甲酸作为方便的 CO 替代物,钯催化的烯烃束缚的氨基甲酰氯的 Heck 羰基化反应。构建一个 C-O 和两个 C-C 键,可在无气体条件下产生带有全碳四元立构中心的多种酯化羟吲哚/γ-内酰胺。该转化具有较宽的底物范围和良好的官能团耐受性,可以轻松应用于后期功能化。
Palladium-catalyzed Heck/aminocarbonylation of alkene-tethered carbamoyl chlorides with nitro compounds for the synthesis of carbamoyl-substituted oxindoles
A straightforward and efficient approach for the synthesis of carbamoyl-substituted oxindoles has been developed via a palladium-catalyzed Heck cyclization and reductive aminocarbonylation reaction of alkene-tethered carbamoyl chlorides with nitro compounds. The reaction showed good compatibility toward versatile functional groups, and both nitroarenes and nitroalkanes were well tolerated. Using Mo(CO)6