Tetrapyrroles. IV. A highly efficient synthesis of homochiral dihydropyrromethenones via Pdo mediated coupling of iodopyrroles and acetylenic amides
作者:Peter A. Jacobi、S. Rajeswari
DOI:10.1016/s0040-4039(00)60941-3
日期:1992.10
Homochiral dihydropyrromethenones of type 20 have been synthesized in a highly efficient manner by Pd(o) mediated coupling of iodopyrrole 14 with acetylenic amides 18, followed by F- catalyzed 5-exo-dig cyclization. In analogous fashion, phytochrome (8) precursor 25a has been prepared in 85% overall yield from iodopyrrole 22.