octaethylporphyrinatorhodium(II) dimer 、 异丙苯-D1 以
not given 为溶剂,
生成
参考文献:
名称:
Formation and thermal reactions of rhodium-carbon bonds derived from the reactions of octaethylporphyrin-rhodium(III) dimer with alkyl carbon-hydrogen bonds in alkyl aromatics
Reactions of polyanions derived from alkylbenzenes
作者:Dieter Wilhelm、Timothy Clark、Paul v. R. Schleyer、John L. Courtneidge、Alwyn G. Davies
DOI:10.1021/ja00314a020
日期:1984.1
Etude des reactions des alkyl- et dialkylbenzenes avec des melanges 1:1 de n-butyl-Li et de t-pentanolate de K pour donner des anions toluenures. Metallation. Spectres RPE de radicaux anioniques. Calculs MNDO
烷基-和二烷基苯反应实验 1:1 正丁基-锂和叔戊醇酸 K 倾倒阴离子甲苯。金属化。Spectres RPE de radicaux anioniques。计算 MNDO
Rhodium‐Catalyzed Stereoselective Deuteration of Benzylic C–H Bonds via Reversible η
<sup>6</sup>
‐Coordination
作者:Qi‐Kai Kang、Yuntong Li、Kai Chen、Hui Zhu、Wen‐Qiang Wu、Yunzhi Lin、Hang Shi
DOI:10.1002/anie.202117381
日期:2022.3.7
A novel rhodium-catalyzed H/D exchange of primary, secondary, and tertiary benzylic C−H bonds by means of an η6-coordination strategy is reported. The method, which features high regioselectivity and stereoretention, shows broad functional group tolerance and has been used in late-stage labeling of pharmaceuticals.
报道了通过 η 6配位策略实现伯、仲和叔苄基 C-H 键的新型铑催化 H/D 交换。该方法具有高区域选择性和立体保留性,具有广泛的官能团耐受性,已用于药物的后期标记。
Radical anion reactions in n-butyl-lithium–potassium t-pentyl oxide mixtures
作者:Dieter Wilhelm、Timothy Clark、Paul von Ragué Schleyer
DOI:10.1039/c39830000211
日期:——
Ethyl- or isopropyl-benzenes react with n-butyl-lithium–potassiumt-pentyloxidemixtures to give coupling products characteristic of styrene radicalanions which are postulated to arise from one-electron oxidation of styrene dianion intermediates.
versatile building blocks for organicsynthesis. However, efficient methods for preparing these organosilicon compounds are lacking. We herein report a highly enantioselective method for synthesis of chiral propargylsilanes and chiral allenylsilanes from readily available alkynyl sulfonylhydrazones. Specifically, chiral spiro phosphate dirhodium complexes were used to catalyze asymmetric insertion of alkynyl
The effects of ion-pairing on the rates of fragmentation of alkali-metal salts of tertiary alcohols
作者:Steven M. Partington、C. Ian F. Watt
DOI:10.1039/p29880000983
日期:——
ion-pair with potassium. Reactions are strongly inhibited by added iodides and again, this is shown to be consistent with the reaction scheme. The salts of 3-methyl-1,2,3-triphenylbutan-2-ol (2) have also been studied. Under similar conditions these are 103 times more reactive than those of (1), fragmenting to deoxybenzoin and cumene. Steric inhibition of ion-pairing and stericenhancement of reactivity
1,2,3-三苯基丙-2-醇(1)的锂盐,钠盐和钾盐在DMSO溶液中以方便的速率分解,生成脱氧安息香和甲苯。在过量碱的条件下,脱氧安息香迅速转化为其烯醇盐,其紫外吸收可用于测定光谱速率。遵循早期工作的期望,锂盐,钠盐和钾盐的(1)比率约为1:122:1 330。已经研究了添加的穴状配体和常见的离子金属碘化物的作用,并且显示出与较早提出的涉及缔合的和“游离的”醇盐阴离子的差异反应性的反应方案相一致。使用穴状配体可以估算(1的未缔合的醇盐的分解速率),在18.6°时为8.5×10 3 s –1,这至少比其与钾的离子对快100倍。加入的碘化物强烈抑制了反应,并且再次表明,这与反应方案是一致的。还研究了3-甲基-1,2,3-三苯基丁烷-2-醇(2)的盐。在相似的条件下,它们的反应活性是(1)的10 3倍,并分裂为脱氧安息香和枯烯。离子对的立体抑制和游离醇盐的反应性在空间上的增强均有助于观察到的反应