55532-27-9Relevant academic research and scientific papers
A Stereoselective Synthesis of Olefins by a New Semi-stabilized Phosphonium Ylide
Gupta, K. C.,Pathak, P. K.,Saxena, B. K.,Srivastava, Nirupma
, p. 196 - 198 (2007/10/02)
A new semi-stabilized phosphonium ylide, viz. (9-anthrylmethylene)triphenylphosphorane (2) generated by the action of sodium hydride or sodamide in benzene or sodium methoxide in methanol on (9-anthrylmethyl)triphenylphosphonium bromide (1), has been reacted with substituted aromatic aldehydes (3) to give exclusively the trans-1-(9-anthryl)-2-substituted-arylethylenes (4).The variation of solvents and bases has no effect on the stereoselectivity of the reaction.The trans-geometry of 4 has been established by IR and PMR spectral data.
Effect of Bulky Size of Carbonyl Systems on Betaine Decomposition of Semi-stablized Arsonium Ylids
Gupta, K. C.,Srivastava, N.,Nigam, R. K.
, p. 802 - 803 (2007/10/02)
Reactions of substituted benzylidentriphenylarsenanes (2a-i) with 9-anthraldehyde and 9-fluorenone have been studied using benzene-sodamide, chloroform-sodium hydride and methanol-sodium ethoxide as solvent-base pairs.In all the cases olefins (5a-i and 6a-i) are formed exclusively.Variation of solvents and bases has no effect on the course of betaine decomposition formed by the nucleophilic attack of ylids on carbonyl systems.
