作者:O. V. Petrova、M. V. Markova、I. A. Ushakov、L. N. Sobenina、E. V. Tretyakov、V. I. Ovcharenko、A. I. Mikhaleva、B. A. Trofimov
DOI:10.1007/s10593-014-1548-6
日期:2014.10
5-Trifluoroacetylpyrrole-2-carbaldehydes were synthesized by low-temperature trifluoroacetylation of pyrrole-2-carbaldehyde acetals using trifluoroacetic anhydride, with subsequent removal of the acetal protecting group by mild acid-catalysed hydrolysis. The hydrolysis was accompanied by the formation of a minor product, (1Е,4Е)-1,5-bis[5-(2,2,2-trifluoroacetyl)-1Н-pyrrol-2-yl]-1,4-pentadien-3-one
通过使用三氟乙酸酐对吡咯-2-甲醛缩醛进行低温三氟乙酰化,然后通过温和的酸催化水解除去缩醛保护基,来合成5-三氟乙酰基吡咯-2-甲醛。水解伴随形成次要产物,(1Е,4Е)-1,5-双[5-(2,2,2-三氟乙酰基)-1Н-吡咯-2-基] -1,4-戊二烯-3-一个,被隔离和识别。