83425-97-2Relevant academic research and scientific papers
Rhodium-Catalyzed Expeditious Synthesis of Indenes from Propargyl Alcohols and Organoboronic Acids by Selective 1,4-Rhodium Migration over β-Oxygen Elimination
Liu, Na,Yao, Jian,Yin, Long,Lu, Tao,Tian, Ziqi,Dou, Xiaowei
, p. 6857 - 6863 (2019)
An expeditious synthetic route to 1,1-disubstituted indenes from propargyl alcohols and organoboronic acids was developed under rhodium catalysis, and selective 1,4-rhodium migration over β-oxygen elimination was involved as the key step. DPEphos was foun
REACTIVITY OF CARBANIONS. XXI. KINETICS OF THE REACTION OF THE ALKALI-METAL SALTS OF CH ACIDS WITH 1-HALOGENOALKANES
Solov'yanov, A. A.,Karpyuk, A. D.,Sizov, A. Yu.,Beletskaya, I. P.,Reutov, O. A.
, p. 1461 - 1466 (2007/10/02)
The kinetics of the alkylation of the alkali-metal of triphenylmethane, fluorene, 1,3-diphenylindene, fluoradene, 9-methoxycarbonylfluorene, and 9-cyanofluorene by 1-halogenoalkanes with the general formula CH3(CH2)nX, where X = Cl, Br, and I and n varies between 0 and 5, were investigated in solvents of the ether type and in dipolar aprotic solvents.It was established that the rate constant for the alkylation of the carbanions decreases with increase in n from 0 to 2.The rate constant increases with further increase in the length of the alkyl chain.The observedextremal dependence of the reaction rate on n is due to the dynamic effects of the hydrocarbon chain.
REACTIVITY OF CARBANIONS. XIII. REACTION OF ALKALINE SALTS OF SUBSTITUTED INDENES WITH 1-BROMOBUTANE
Solov'yanov, A. A.,Beletskaya, I. P.,Reutov, O. A.
, p. 1194 - 1204 (2007/10/02)
The alkaline salts of 3-methyl-, 2-methyl, 1,3-dimethyl, 1-methyl-3-phenyl, 3-phenyl, and 1,3-diphenylindene exist as an equilibrium mixture of free anions and ion pairs.The ion pairs of the alkaline derivatives of mono- and dialkylindenes are of the contact type.The introduction of a phenyl group into the indene system leads to the appearance of solvent-separated ion pairs in addition to cantact ion pairs.The rate constants were found for alkylation of the ions and ion pairs of the alkaline salts of the substituted indenes by 1-bromobutane.The reactivity (ki) ofthe free anions increases in the series: 1,3-diphenylindenyl (1.43E-2 liter/mole.sec)3-phenylindenyl (0.49 liter/mole.sec)1-methyl-3-phenylindenyl (1.14 liter/mole.sec)indenyl (85.8 liter/mole.sec)3-methylindenyl(202 liter/mole.sec)2-methylindenyl (215 liter/mole.sec)1,3-dimethylindenyl (524 liter/mole.sec).In all cases, the reactivity of the ion pairs increases with decreasing alkali cation radius.
