novel enantioselective process. We set out to establish whether boronic esters were general substrates in the Petasis reaction. Pinacolyl boronic esters were selected for study as a model substrate for more complex homochiral boronic esters because of their ease of synthesis and chemical stability. We found that pinacolyl boronic esters do not react with imines derived from primary amines and glyoxylic
硼酸酯与
亚胺或
亚胺物种的多组分反应(通过胺与
乙醛酸的反应原位生成)尽管目前对
硼酸的相应反应(Petasis反应)感兴趣,但在文献中却很少受到关注。此外,在该反应中使用
硼酸酯是特别有吸引力的,因为手性酯可以在新型对映选择性方法中用作助剂。我们着手确定
硼酸酯是否是Petasis反应中的一般底物。选择
频哪醇硼酸酯作为更复杂的同手性
硼酸酯的模型底物,因为它们易于合成和
化学稳定性,因此被选作模型底物。我们发现
频哪醇硼酸酯在标准条件下不会与衍生自
伯胺和
乙醛酸的
亚胺反应。