Practical, metal-free remote heteroarylation of amides <i>via</i> unactivated C(sp<sup>3</sup>)–H bond functionalization
作者:Nana Tang、Xinxin Wu、Chen Zhu
DOI:10.1039/c9sc02564b
日期:——
heteroarylation of amides via C(sp3)–Hbondfunctionalization. Amidyl radicals are directly generated from the amide N–H bonds under mild conditions, which trigger the subsequent 1,5-HAT process. A wide scope of aliphatic amides including carboxamides, sulfonamides, and phosphoramides are readily modified at remoteC(sp3)–H bonds by installing diverse heteroaryl groups. Borne out of pragmatic consideration
When phosphoryl azide meets mechanochemistry: clean, rapid, and efficient synthesis of phosphoryl amides under B(C<sub>6</sub>F<sub>5</sub>)<sub>3</sub> catalysis in a ball mill
作者:Lin-Yu Jiao、Xin-Hua Peng、Ze-Lin Wang、Nan Jia、Zhuo Li
DOI:10.1039/d1cy01314a
日期:——
We described herein the first example associated with B(C6F5)3-catalyzed preparation of phosphoryl amides under mechanochemical conditions. In this novel system, the combination of energetic reagents with an energetic mechanochemical process enabled the reaction to proceed under very mild conditions and accelerated the desired nucleophilic attack on the phosphorus center.
我们在本文中描述了与在机械化学条件下B(C 6 F 5 ) 3催化制备磷酰胺相关的第一个实例。在这个新系统中,高能试剂与高能机械化学过程的结合使反应能够在非常温和的条件下进行,并加速所需的对磷中心的亲核攻击。
Substitution of diarylphosphoryl azides with aliphatic amines catalyzed by simple rare‐earth metal salts: Efficient and novel preparation of phosphoryl amides
A novel and high efficient protocol was disclosed herein for the rare-earth metal salt-catalyzed substitution of phosphorylazides with amines. In this homogeneous catalysis system, different diarylphosphoryl azides and aliphatic and aromatic amines were evaluated under the optimized reaction conditions, and a series of phosphoryl amides were generated through LaCl3 catalysis for the first time in
Photoinduced Site-Selective C(sp<sup>3</sup>)–H Chlorination of Aliphatic Amides
作者:Yanshuo Zhu、Jingcheng Shi、Wei Yu
DOI:10.1021/acs.orglett.0c03297
日期:2020.11.20
Herein, we report a newphotochemical method for C(sp3)–H chlorination of amides which employs tert-butyl hypochlorite as the chlorinating agent and a household compact fluorescent lamp as the light source. The reaction proceeds via N-heterocyclic carbene SIPr·HCl-promoted N–H chlorination and subsequent photoinduced Hofmann–Löffler–Freytag chlorine atom transfer. The latter process is facilitated
Zinc‐catalyzed transformation of diarylphosphoryl azides to diarylphosphate esters and amides
作者:Jun Ying、Qian Gao、Xiao‐Feng Wu
DOI:10.1002/asia.202000154
日期:2020.5.15
We have developed a facile and efficient procedure for the synthesis of diarylphosphate esters and amides. Using Zn(acac)2 as the catalyst, the reaction of diarylphosphoryl azides with aliphatic alcohols and phenols through an unusual P-N bond cleavage provided a number of diarylphosphate esters in good yields (22 examples, up to 94%). Additionally, various diarylphosphate amides were obtained from