56680-32-1

Upstream product

• 574-17-4 1-acetyl-1H-indole-2,3-dione 
• 1439-43-6 1-(4-nitro-phenyl)-2-(triphenyl-λ⁵-phosphanylidene)-ethanone 

Downstream Products

• 1361951-87-2 (3S,4'S,5'S)-tert-butyl 1-acetyl-5'-(3,5-dimethyl-1H-pyrazole-1-carbonyl)-4'-(4-nitrobenzoyl)-2-oxo-2'-thioxospiro[indoline-3,3'-pyrrolidine]-1'-carboxylate 
• 71307-27-2 9-acetyl-2-ethoxy-4-(4-nitro-benzoyl)-4,9-dihydro-pyrano[2,3-b]indole 

Relevant academic research and scientific papers

Core structure-based design of organocatalytic [3+2]-cycloaddition reactions: Highly efficient and stereocontrolled syntheses of 3,3′-pyrrolidonyl spirooxindoles

Extraordinary levels of stereocontrol were achieved in an efficient organocatalytic asymmetric [3+2]-cycloaddition reaction between an α-isothiocyanato imide and various methyleneindolinones. Simple precursors were used for the rapid construction of spiro

Reaction of isatins with acylmethylenetriphenylphosphoranes

The Wittig reaction of isatin, 5-bromoisatin, and 1-acetylisatin with methoxycarbonyl- or aroylmethylenetriphenylphosphoranes proceeds regioselectively to give Z- or combined Z- and E-isomeric 3-acetylmethyleneindol-2-ones. Ethoxymethylenetriphenylphospho