Direct Tryptophols Synthesis from 2-Vinylanilines and Alkynes via C≡C Triple Bond Cleavage and Dioxygen Activation
作者:Tao Shen、Yiqun Zhang、Yu-Feng Liang、Ning Jiao
DOI:10.1021/jacs.6b08094
日期:2016.10.12
metal-free C≡C triple bondcleavage, dioxygen activation, and reassembly into tryptophol derivatives has been developed. This chemistry provides a novel, simple, and efficient approach to highly valuable tryptophol derivatives from simple substrates under mild conditions. The mechanistic studies may promote the discovery of new methodologies through C-C bondcleavage and dioxygen activation.
已经开发出一种意想不到的无金属 C≡C 三键断裂、双氧活化和重新组装成色氨酸衍生物。这种化学反应提供了一种新颖、简单且有效的方法,可以在温和条件下从简单底物获得高价值的色氨酸衍生物。机理研究可能会通过 CC 键裂解和分子氧活化促进新方法的发现。
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。
Iron‐Catalyzed Reductive Cyclization by Hydromagnesiation: A Modular Strategy Towards
<i>N</i>
‐Heterocycles
作者:Joachim Loup、Egor M. Larin、Mark Lautens
DOI:10.1002/anie.202106996
日期:2021.10.4
N-heterocycles, through the use of ortho-vinylanilides, is reported. The reaction is catalyzed by an inexpensive and bench-stable iron complex and generally occurs at ambient temperature. The transformation likely proceeds through hydromagnesiation of the vinyl group, and trapping of the in situ generated benzylic anion by an intramolecular electrophile to form the heterocycle. This iron-catalyzed strategy
The synthesis of BN-embedded tetraphenes and their photophysical properties
作者:Huanan Huang、Zexiong Pan、Chunming Cui
DOI:10.1039/c6cc00161k
日期:——
A series of intensely blue fluorescent BN-embedded tetraphene derivatives have been synthesized by the catalytic cyclization of BN-naphthalenes with alkynes.
The radicalreaction of benzenethiol with S-4-pentynyl carbamothioates provides a valuable protocol for the tin-free generation of carbamoylradicals, which arise from intramolecular substitution at sulfur by the initial sulfanylvinyl radicals. This procedure can be usefully employed to achieve N-benzylcarbamoyl radical 5-exo and 4-exo cyclizations leading, respectively, to pyrrolidinones and azetidinones