Mild and Phosphine-Free Iron-Catalyzed Cross-Coupling of Nonactivated Secondary Alkyl Halides with Alkynyl Grignard Reagents
作者:Chi Wai Cheung、Peng Ren、Xile Hu
DOI:10.1021/ol501087m
日期:2014.5.2
cross-coupling of nonactivated secondary alkylbromides and iodides with alkynyl Grignardreagents at room temperature has been developed. A wide range of secondary alkyl halides and terminal alkynes are tolerated to afford the substituted alkynes in good yields. A slight modification of the reaction protocol also allows for cross-coupling with a variety of primary alkyl halides.
Chlorotrimethylsilane/sodium iodide in the presence of water has been found as facile method for the hydroiodination of olefins to alkyl iodides under mild conditions. This procedure has successfully been extended to the preparation of deuterated alkyl iodides by using deuterium oxide in place of water.
Hydroborations, reductions and reductive iodinations using BHI2: N(C2H5)2Ph Complex
作者:Ch. Kishan Reddy、Mariappan Periasamy
DOI:10.1016/s0040-4020(01)80500-7
日期:1992.1
useful for hydroboration of alkenes, reduction of amides, iodination of alcohols, reductive iodination of carboxylic acids, aldehydes and ketones. Selective hydroboration of monosubstituted olefin over disubstituted olefinic moiety and terminal olefins over internal alkyne moiety have been achieved using this reagent. Carboxylic esters and nitriles are not affected by this reagent. Selective hydroboration
通过BH 3:N(C 2 H 5)2 Ph与I 2反应制备的BHI 2:N(C 2 H 5)2 Ph络合物可以用于烯烃的硼氢化,酰胺的还原,醇的碘化,羧酸,醛和酮的还原碘化。使用该试剂已经实现了在二取代的烯烃部分上的单取代烯烃和在内部炔烃部分上的末端烯烃的选择性氢硼化。羧酸酯和腈不受该试剂的影响。在酯和腈官能团的存在下,实现了1-烯烃的选择性硼氢化和环己酮的选择性还原碘化。
A new, simple procedure for the generation and addition of HI to alkenes and alkynes using Bl3:N,N-diethylaniline complex and acetic acid
作者:Ch. Kishan Reddy、M. Periasamy
DOI:10.1016/s0040-4039(00)98817-8
日期:1990.1
Hydroiodic acid generatedin situ from Bl3:N,N-diethylanilinecomplex and acetic acid, readily adds to alkenes and alkynes in Markovnikov fashion to form alkyl and alkenyl iodides in good yields under mild conditions.
The identification of 8-ethyl-2-phenylamino-8H-pyrido[2, 3-d]pyrimidin-7-one (1) as an inhibitor of Cdk4 led to the initiation of a program to evaluate related pyrido[2, 3-d]pyrimidin-7-ones for inhibition of cyclin-dependentkinases (Cdks). Analysis of more than 60 analogues has identified some clear SAR trends that may be exploited in the design of more potent Cdk inhibitors. The most potent Cdk4