Electrochemical Trifluoromethylthiolation and Spirocyclization of Alkynes with AgSCF<sub>3</sub>: Access to SCF<sub>3</sub>-Containing Spiro[5,5]trienones
作者:Wen-Chao Yang、Ming-Ming Zhang、Yu Sun、Cai-Yun Chen、Lei Wang
DOI:10.1021/acs.orglett.1c02260
日期:2021.9.3
efficient strategy for trifluoromethylthiolation and dearomatization of activated alkynes with stable and readily available AgSCF3 has been developed. Reported herein is the unprecedented electrochemical generation of the SCF3 radical in the absence of persulfate for the synthesis of SCF3-containing spiro[5,5]trienones in good yields via a 6-exo-trig radical cyclization.
Novel functionalized 1,3-dialkylimidazolinium salts (LHCl) as NHC precursors have been prepared and successfully applied in palladium-catalyzedarylation of benzaldehydes. The ortho position of aromatic aldehydes was directly and selectively arylated with aryl chlorides in the presence of a catalytic system prepared in situ from Pd(OAc)2, 1,3-dialkylimidazolinium chlorides (), and Cs2CO3. J. Heterocyclic
新型的功能化的1,3-二烷基咪唑啉盐(LHCl)作为NHC的前体已被制备,并成功地用于钯催化的苯甲醛芳基化。芳香醛的邻位直接和选择性地与芳基氯芳基化中制备的催化体系的存在下原位(OAC)选自Pd 2,1,3- dialkylimidazolinium氯化物()和Cs 2 CO 3。J.杂环化学。(2009)
Catalytic Cleavage of Unactivated C(aryl)–P Bonds by Chromium
We describe here the coupling to transform aryl phosphine derivatives by the cleavage of unactivated C(aryl)–P bonds with chromium catalysis, allowing us to achieve the reaction with alkyl bromides and arylmagnesium reagentsundermildconditions. Mechanistic studies indicate that catalytic cleavage of unactivated C(aryl)–P bonds is due to the in situ formed reactive Cr, followed by transmetalation
Palladium-Catalyzed<i>ortho</i>C−H Arylation of Benzaldehydes Using<i>ortho</i>-Sulfinyl Aniline as Transient Auxiliary
作者:Delong Mu、Gang He、Gong Chen
DOI:10.1002/asia.201800581
日期:2018.9.4
PdII‐catalyzed ortho‐(Csp2)–H arylation reaction of benzaldehydes using a catalytic amount of 2‐(methylsulfinyl)aniline as transient auxiliary was developed. This reaction is compatible with a broad range of benzaldehyde and aryl iodide substrates. Compared with other related reaction systems, an excellent regioselectivity for ortho‐C(sp2)−H bonds over benzylic C(sp3)−H bonds was obtained for orth
K2S2O8-promoted radical trifluoromethylthiolation/spirocyclization for the synthesis of SCF3‑featured spiro[5,5]trienones
作者:Liu-Yu Shen、Yu Sun、Yu-Qi Wang、Bing Li、Wen-Chao Yang、Peng Dai
DOI:10.1016/j.tet.2022.132649
日期:2022.1
ynones with stable and readily available AgSCF3 has been developed. The reaction occurs smoothly in the presence of K2S2O8 via a 6-exo-trig radical cyclization, providing a variety of SCF3-containing spiro [5,5]trienones in good yields.
已经开发出一种直接有效的三氟甲基硫醇化和联芳基炔酮与稳定且易于获得的 AgSCF 3脱芳构化的策略。该反应在 K 2 S 2 O 8存在下通过 6 - exo -trig 自由基环化反应顺利进行,以良好的收率提供了多种含 SCF 3的螺[5,5]三烯酮。