1‐disubstituted alkenes via radicaladdition‐anionic cyclization cascade has been successfully developed. Another new protocol based on photocatalytic allylation and cyclopropanation cascade was also described between allylic halide and halomethyl radical. In addition to the successful use of bis‐catecholato silicates as the alkylradical precursors, the acyl and alkylradicals derived from 1,4‐dihydropyridines
A palladium-catalyzed domino process for the quick assembly of tricyclic-fused heterocycles starting from aryl iodides and functionalized isocyanides containing a disubstituted terminal alkene has been developed. The process is triggered by intermolecular isocyanide insertion, followed by Heck-type carbopalladation of the intramolecular alkene moiety and subsequent C(sp2)–H activation. Moreover, an
Synthesis of Five-, Six-, and Seven-Membered 1,3- and 1,4-Heterocyclic Compounds via Intramolecular Hydroalkoxylation/Hydrothioalkoxylation of Alkenols/Thioalkenols
作者:Manash J. Deka、Kiran Indukuri、Sabera Sultana、Madhurjya Borah、Anil K. Saikia
DOI:10.1021/acs.joc.5b00049
日期:2015.5.1
alkenes and alcohols/thiols mediated by boron trifluoride etherate leads to five-membered thiazolidine, six-membered 1,4-oxazines (morpholines) and tetrahydro-2H-1,4-thiazines (thiomorpholines), and seven-membered 1,4-oxazepanes in good yields.
三氟化硼醚化物介导的氮链烯烃和醇/硫醇的分子内加氢烷氧基化/氢硫代烷氧基化反应会生成五元噻唑烷,六元1,4-恶嗪(吗啉)和四氢-2 H -1,4-噻嗪(硫吗啉) ,和七元1,4-恶唑烷,收率高。
Radical Alkene-Trifluoromethylation-Triggered Nitrile Insertion/Remote Functionalization Relay Processes: Diverse Synthesis of Trifluoromethylated Azaheterocycles Enabled by Copper Catalysis
alkene-trifluoromethylation-triggered nitrile insertion/remotefunctionalizationrelay process has been achieved, in which “interrupted” remote 1,n-difunctionalizations of alkenes with nitrile insertion can deliver iminyl radical intermediates instead of C-based radicals, followed by subsequent 1,n-HAT to furnish corresponding remotefunctionalization. This relay protocol enables a straightforward approach to
已经实现了铜催化的烯烃-三氟甲基化触发的腈插入/远程功能化中继过程,其中“中断”的远程 1, n -具有腈插入的烯烃的双官能化可以提供亚氨基自由基中间体而不是 C 基自由基,然后是随后的 1, n -HAT 提供相应的远程功能化。该中继协议能够以一种简单的方法来简化结构多样的三氟甲基化氮杂环的组装。
Enantioselective Copper‐Catalyzed Borylative Cyclization for the Synthesis of Quinazolinones
作者:Quentin Dherbassy、Srimanta Manna、Chunling Shi、Watcharapon Prasitwatcharakorn、Giacomo E. M. Crisenza、Gregory J. P. Perry、David J. Procter
DOI:10.1002/anie.202103259
日期:2021.6.21
Quinazolinones are common substructures in molecules of medicinal importance. We report an enantioselectivecopper-catalyzed borylative cyclization for the assembly of privileged pyrroloquinazolinone motifs. The reaction proceeds with high enantio- and diastereocontrol, and can deliver products containing quaternary stereocenters. The utility of the products is demonstrated through further manipulations