182227-63-0

Upstream product

• 41491-33-2 sodium p-chlorophenylselenide 
• 20541-49-5 bis(p-chlorophenyl) diselenide 
• 517-23-7 3-acetyl-2-oxo-4,5-dihydrofuran 
• 182227-59-4 Z-1-(2-oxo-4,5-dihydrofuran-3-ylidene)trifluoromethanesulfonic acid ethyl ester 
• 316129-39-2 Z-2-[2-(4-chlorophenylselanyl)ethyl]-3-methylpent-2-en-4-ynoic acid 
• 182227-61-8 Z-3-[1-methyl-3-(trimethylsilanyl)prop-2-ynylidene]tetrahydrofuran-2-one 

Downstream Products

• 256638-30-9 3-{5-[3-(1-benzyloxy-ethyl)-4-methyl-5-oxo-pyrrolidin-2-ylidenemethyl]-2-[3-(2-methoxycarbonyl-ethyl)-4-methyl-5-(3-methyl-5-oxo-4-vinyl-5H-furan-2-ylidenemethyl)-pyrrol-2-ylidenemethyl]-4-methyl-1H-pyrrol-3-yl}-propionic acid methyl ester 
• 256638-29-6 3-{5-[3-(1-benzyloxy-ethyl)-4-methyl-5-oxo-dihydro-furan-2-ylidenemethyl]-2-[3-(2-methoxycarbonyl-ethyl)-4-methyl-5-(3-methyl-5-oxo-4-vinyl-5H-furan-2-ylidenemethyl)-pyrrol-2-ylidenemethyl]-4-methyl-1H-pyrrol-3-yl}-propionic acid methyl ester 
• 256638-26-3 3-{5-(5-imino-3-methyl-4-vinyl-5H-furan-2-ylidenemethyl)-2-[5-iodo-3-(2-methoxycarbonyl-ethyl)-4-methyl-1H-pyrrol-2-ylmethylene]-4-methyl-2H-pyrrol-3-yl}-propionic acid methyl ester 
• 256638-23-0 3-{5-[(Z)-4-Carbamoyl-6-(4-chloro-phenylselanyl)-3-methyl-hex-3-en-1-ynyl]-2-[1-[5-iodo-3-(2-methoxycarbonyl-ethyl)-4-methyl-1H-pyrrol-2-yl]-meth-(Z)-ylidene]-4-methyl-2H-pyrrol-3-yl}-propionic acid methyl ester 

Relevant academic research and scientific papers

New syntheses of the C,D-ring pyrromethenones of phytochrome and phycocyanin

Pyrromethenone 7, the C,D-ring segment of phytochrome (Pr, 4), has been prepared in an efficient fashion employing three new strategies. Each of these has potential advantages for the synthesis of labeled material. Our first approach is related to the Gos

An improved synthesis of the C,D-ring pyrromethenone of phytochrome and phytochromobilin

Pyrromethenone 1b, the C,D-ring segment of both phytochrome (Pr) and phytochromobilin (PΦB) has been prepared in a highly efficient fashion beginning with 2-acetyl-butyrolactone (8). The key steps involved conversion of 8 to the Z-enol triflate 9, followe