通过钯(II)催化的分子内合成-羟基钯/烯烃插入/ sp 2 -C–H键活化直接访问9-Chloro-1 H-苯并[ b ]呋喃[3,4- e ]氮杂-1-酮级联
摘要:
建立了一种有效的Pd(II)催化级联方法,用于从具有侧链α的N-炔丙基芳基胺开始合成9-氯-1 H-苯并[ b ]呋喃[3,4- e ]氮杂-1-酮,β-不饱和酯支架。该顺序过程的机制涉及分子内的顺氧基palpalation,随后的烯烃插入和邻位sp 2 -C-Cl键形成反应。这种高原子和步长经济的级联序列在一次合成操作中产生了两个杂环和三个新键。
通过钯(II)催化的分子内合成-羟基钯/烯烃插入/ sp 2 -C–H键活化直接访问9-Chloro-1 H-苯并[ b ]呋喃[3,4- e ]氮杂-1-酮级联
摘要:
建立了一种有效的Pd(II)催化级联方法,用于从具有侧链α的N-炔丙基芳基胺开始合成9-氯-1 H-苯并[ b ]呋喃[3,4- e ]氮杂-1-酮,β-不饱和酯支架。该顺序过程的机制涉及分子内的顺氧基palpalation,随后的烯烃插入和邻位sp 2 -C-Cl键形成反应。这种高原子和步长经济的级联序列在一次合成操作中产生了两个杂环和三个新键。
Palladium-Catalyzed Intramolecular Oxypalladation-Initiated Cascade: Solvent-Dependent Chemodivergent Approach to Functionalized Benzazepines and Tetrahydroquinolines
作者:Anish Gupta、Tanvi Jandial、Muthu Karuppasamy、Nattamai Bhuvanesh、Nagarajan Subbiah、Uma C. Maheswari、Vellaisamy Sridharan
DOI:10.1039/d3cc01370g
日期:——
Palladium-catalyzed, solvent-dependent intramolecular oxypalladation-triggered domino sequences of internal alkynes bearing tethered nucleophilic carboxylic ester and electrophilic enone functionalities were developed for the chemodivergent synthesis of two completely distinct biologically significant complex molecules including isochromenone-fused benzazepines and isobenzofuranone-fused tetrahydr
Synthesis of (Z)-1,2-dihydro-1-tosylbenzo[b]azepin-3-ones by two-step, one-pot gold-catalyzed tandem heterocyclization/Petasis–Ferrier rearrangement of 2-(N-(prop-2-ynyl)-N-tosylamino)benzaldehydes
作者:Ella Min Ling Sze、Ming Joo Koh、Yen Min Tjia、Weidong Rao、Philip Wai Hong Chan
DOI:10.1016/j.tet.2013.04.069
日期:2013.7
A two-step, one-pot synthetic method that relies on gold(I)-catalyzed tandem heterocyclization/Petasis-Ferrier rearrangement and Bronsted acid-assisted debenzoxylation of 2-(N-(prop-2-ynyl)-N-tosylamino)benzaldehydes to prepare (2)-1,2-dihydro-1-tosylbenzo[b]azepin-3-ones efficiently is reported. The reactions proceed rapidly under mild and operationally straightforward conditions for a wide variety of aldehyde substrates containing electron-withdrawing, electron-donating, and sterically demanding functional groups and afforded the corresponding benzo-fused azaheterocyclic products in moderate to excellent yields. (C) 2013 Elsevier Ltd. All rights reserved.