Photoinduced Cross-Coupling of Aryl Iodides with Alkenes
作者:Yuliang Liu、Haoyu Li、Shunsuke Chiba
DOI:10.1021/acs.orglett.0c03935
日期:2021.1.15
A protocol for photoinduced cross-coupling of aryliodides having polar π-functional groups or elongated π-conjugation with alkenes has been developed. The radical cascade mechanism involving generation of aryl radicals via C–I bond homolysis of photoexcited aryliodides and their subsequent addition to alkenes is proposed. The method enables iodide-selective cross-coupling over other halogen leaving
Thiyl‐radical‐catalyzed cyclization reactions of N‐tosyl vinylaziridines and alkenes were developed as a new synthetic method for the generation of substituted pyrrolidines. The key to making this process accessible to a broad range of substrates is the use of a sterically demanding thiyl radical, which prevents the undesired degradation of the catalyst.
Reactions of relevance to the chemistry of aminoglycoside antibiotics. Part 8. Synthesis and properties of O-alkyl selenoesters
作者:Derek H. R. Barton、Per-Egil Hansen、Kelvin Picker
DOI:10.1039/p19770001723
日期:——
from the appropriate di-N-substituted imidoyl chloride with use of sodium hydrogen selenide to introduce selenium. The reduction of selenoesters to ethers has been demonstrated, as well as the ready reaction of these compounds with the methylene Wittig reagent.
Oximes and hydrazones that are useful in treating sexual dysfunction
申请人:Kolasa Teodzyj
公开号:US20050176727A1
公开(公告)日:2005-08-11
The present invention relates to oximes and hydrazones of formula (I)
for the treatment of sexual dysfunction and to compositions containing compounds of formula (I) for the treatment of sexual dysfunction.
Reactions of Cp2TiMe2 with ferrocene and (ɳ5-Cp)Co(ɳ4-C4Ph4) derived esters and amides: A new route for 1-methylvinyl and methyl ketone derived metal sandwich compounds
作者:Jatinder Singh、Sanjib Ghosh、Mayukh Deb、Anil J. Elias
DOI:10.1016/j.jorganchem.2016.05.024
日期:2016.9
extended to metal sandwich derivedamides, thio and seleno esters. By controlling the amount of Cp2TiMe2, the reactions were also stopped at the methyl ketone stage and the methyl ketones were isolated in good yields and characterized. The method provides an easy and direct access to convert organometallic sandwich derived esters and related compounds to 1-methylvinyl derived products.
Cp的反应2时间2,与有机金属化合物三明治的酯衍生物(ɳ 5 -RC 5 H ^ 4)的Fe(ɳ 5 -C 5 H ^ 5)和(ɳ 5 -RC 5 H ^ 4)的Co(ɳ 4 -C 4 Ph 4)(R =酯基)得到具有R = C(CH 2)Me的产物,而不是预期的乙烯基醚,表明Cp 2 TiMe 2将酯单元转化为甲基酮,然后进行甲基化。Cp 2 TiMe 2的反应与二酯(ɳ 5 -RC 5 H ^ 4)的Co(ɳ 4 -C 4博士3 R)(R C(O)OME)也得到相似的结果。该研究也已成功地扩展到金属夹心衍生的酰胺,硫代和硒代酯。通过控制Cp 2 TiMe 2的量,反应也停止在甲基酮阶段,并以高收率分离出甲基酮并进行表征。该方法提供了将有机金属夹心衍生的酯和相关化合物转化为1-甲基乙烯基衍生的产物的容易且直接的途径。