77978-96-2

Upstream product

• 98-88-4 benzoyl chloride 
• 77978-93-9 3,7-Dimethoxycarbonyl-1-ethoxy-9,11-dihydro-9-oxo-10H-dipyrromethen-2,8-diessigsaeure-dimethylester 
• 77978-77-9 5-Dimethylaminomethylen-4-methoxycarbonyl-2-oxo-3-pyrrolin-3-essigsaeure-methylester 
• 77978-81-5 2-Ethoxy-5-formyl-4-methoxycarbonyl-3-pyrrolessigsaeure-methylester 
• 77978-85-9 2-Acetoxy-4-methoxycarbonyl-5-methyl-3-pyrrolessigsaeure-methylester 
• 77978-80-4 5-Dimethylaminomethylen-2-ethoxy-4-methoxycarbonyl-5H-pyrrol-3-essigsaeure-methylester 
• 77978-75-7 5-Chlormethylen-4-methoxycarbonyl-2-oxo-3-pyrrolin-3-essigsaeure-methylester 
• 77978-87-1 2-Ethoxy-4-methoxycarbonyl-5-methyl-3-pyrrolessigsaeure-methylester 
• 77978-73-5 4-Methoxycarbonyl-5-methyl-2-oxo-4-pyrrolin-3-essigsaeure 
• 21731-17-9 methyl 3-aminocrotonate 
• 77978-86-0 2-Chlor-4-methoxycarbonyl-5-methyl-3-pyrrolessigsaeure-methylester 
• 77978-74-6 4-Methoxycarbonyl-5-methyl-2-oxo-4-pyrrolin-3-essigsaeure-methylester 

Relevant academic research and scientific papers

Pyrrolinones, IV Pyrrolin-2-ones with Electron Attracting Substituents in the &β-Positions

The pyrrolinones 3-7, synthesized from maleic acid derivatives and enamines and also their reaction products 8-24 are described.By comparison with the classic-type dipyrromethenes 26, 30 and 31 the dipyrromethenes 27 as well as 25, 28 and 29 are shown to exist as lactams (neo-type dipyrromethenes).In basic solution 27 exhibits a deep blue colour which is unusual for dipyrromethenes.