167390-32-1Relevant articles and documents
An improved synthesis of the C,D-ring pyrromethenone of phytochrome and phytochromobilin
Jacobi, Peter A.,Guo, Jiasheng,Hauck, Sheila I.,Leung, Sam H.
, p. 6069 - 6072 (1996)
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
Synthesis of Cyclic Enamides by Intramolecular Cyclization of Acetylenic Amides.
Jacobi, Peter A.,Brielmann, Harry L.,Hauck, Sheila I.
, p. 1193 - 1196 (2007/10/02)
Cyclic enamides 12 of a type useful in the synthesis of naturally occuring chlorins, isobacteriochlorins, and corrins have been prepared by a process involving Nicholas-Schreiber condensation to afford acetylenic amides 13, followed by either n-Bu4NF- or