A New and Convenient Wittig-type Reaction for the Preparation of Pyrromethenone Derivative
作者:Hideki Kinoshita、Hla Ngwe、Kazuhiro Kobori、Katsuhiko Inomata
DOI:10.1246/cl.1993.1441
日期:1993.8
The reaction of 5-(p-toluenesulfonyl)-3,4-disubstituted Δ3-pyrrolin-2-one with aldehydes in the presence of tributylphosphine and 1,8-diazabicyclo[5.3.0]undec-7-ene gave the corresponding 5-exomethylene compounds in good yields. A pyrromethenone derivative as a potential equivalent to C/D ring component of phytochromobilin dimethyl ester was effectively prepared by means of the present method.
在三丁基膦和 1,8-二氮杂双环[5.3.0]十一碳-7-烯存在下,5-(对甲苯磺酰基)-3,4-二取代的 Δ3-吡咯啉-2-酮与醛反应得到相应的 5 -外亚甲基化合物收率良好。通过本方法有效地制备了吡咯甲酮衍生物作为植物色素二甲酯的C/D环组分的潜在等价物。