Optimisation of the allylsilane approach to C-10 deoxo carba analogues of dihydroartemisinin: synthesis and in vitro antimalarial activity of new, metabolically stable C-10 analogues
Enantioselective Synthesis of α-Allyl Amino Esters via Hydrogen-Bond-Donor Catalysis
作者:Andrew J. Bendelsmith、Seohyun Chris Kim、Masayuki Wasa、Stéphane P. Roche、Eric N. Jacobsen
DOI:10.1021/jacs.9b05556
日期:2019.7.24
diastereoselec-tive synthesis of α-allyl amino esters. The optimized protocol provides access to N-carbamoyl-protected amino esters via nucleophilic allyla-tion of readily accessible α-chloro glycinates. A variety of useful α-allyl amino esters were prepared-including crotylated products bearing vicinal stereocenters that are inaccessible through enolate alkylation-with high enantioselectivity (up to 97% ee)
Trifluoromethylthiolation of Allylsilanes and Silyl Enol Ethers with Trifluoromethanesulfonyl Hypervalent Iodonium Ylide under Copper Catalysis
作者:Sadayuki Arimori、Masahiro Takada、Norio Shibata
DOI:10.1021/acs.orglett.5b00057
日期:2015.3.6
Electrophilic trifluoromethylthiolation of allylsilanes and silyl enol ethers with trifluoromethanesulfonyl hypervalentiodoniumylide has been conducted. In the presence of a catalytic amount of CuF2, the reaction proceeded in modest to high yields under mild conditions.
Electrophilic Trifluoromethylthiolation of Allylsilanes with Trifluoromethanesulfanamide
作者:Jianbo Liu、Lingling Chu、Feng-Ling Qing
DOI:10.1021/ol400032g
日期:2013.2.15
A CH3COCl-promoted allylic trifluoromethylthiolation of allylsilanes with trifluoromethanesulfanamide has been described. The method allows for an efficient synthesis of a wide range of allylic trifluoromethylthiolated compounds under mild conditions.
Visible Light-Induced Methoxycarbonyldifluoromethylation of Trimethylsilyl Enol Ethers and Allyltrimethylsilanes with FSO<sub>2</sub>
CF<sub>2</sub>
CO<sub>2</sub>
Me
作者:Wei Yu、Yao Ouyang、Xiu-Hua Xu、Feng-Ling Qing
DOI:10.1002/cjoc.201800318
日期:2018.11
omethylation of trimethylsilyl enol ethers with FSO2CF2CO2Me in the presence of fac‐Ir(ppy)3 was developed. This reaction provided a practical strategy for the construction of various α‐CF2CO2R aromatic ketones, which are difficult to access by other methods. Furthermore, a series of methoxycarbonyldifluoromethylated allylic compounds could also be obtained from allyltrimethylsilanes using the same
在fac -Ir(ppy)3存在下,用FSO 2 CF 2 CO 2 Me对三甲基甲硅烷基烯醇醚进行了光催化甲氧基羰基二氟甲基化反应。该反应的各种α-CF的构造提供了一种实用的策略2 CO 2 - [R芳族酮,这是难以通过其它方法获得。此外,也可以使用相同策略从烯丙基三甲基硅烷获得一系列甲氧基羰基二氟甲基化的烯丙基化合物。所得的含CF 2 CO 2 R的产品是有用的组成部分,在药物化学和材料科学中具有潜在的价值。
Optimisation of the allylsilane approach to C-10 deoxo carba analogues of dihydroartemisinin: synthesis and in vitro antimalarial activity of new, metabolically stable C-10 analogues
作者:Paul M. O'Neill、Matthew Pugh、Andrew V. Stachulski、Stephen A. Ward、Jill Davies、B. Kevin Park
DOI:10.1039/b104340b
日期:2001.10.11
An optimised protocol has been developed for the coupling of dihydroartemisinin benzoate with a range of aromatic allylsilanes to provide a number of new C-10 deoxo derivatives (11a–11g) in yields ranging from 70 to 94%. These compounds were up to ten times more potent than artemisinin in in vitro tests against the chloroquine resistant K1 strain of Plasmodium falciparum. Ferrous mediated degradation of these analogues produces as the main product, a dicarbonyl formate 12, which is not seen when the same reaction is carried out with artemisinin or artemether. This finding may indicate that analogues in this class have a subtly different “antimalarial” mechanism of action.