Regioselective pyrrole synthesis from asymmetric β-diketone and conversion to sterically hindered porphyrin
作者:Hiroshi Fujii、Tetsuhiko Yoshimura、Hitoshi Kamada
DOI:10.1016/s0040-4039(97)00039-7
日期:1997.2
The condensation of asymmetric β-diketones with α-oximinoacetoacetate esters affords pyrroles regioselectively. The mechanism of the regioselectivity is studied using 13C-NMR spectroscopy. Pyrrole having a neopentyl group at the 4-position is synthesized by the method, and further converted to a steric hindered porphyrin in good yield.
不对称的β-二酮与α-氧亚氨基乙酰乙酸酯的缩合可选择性地提供吡咯。使用13 C-NMR光谱研究了区域选择性的机理。通过该方法合成在4-位具有新戊基的吡咯,并以良好的收率将其进一步转化为位阻卟啉。