The 1,1‘-binaphthyl macrocycle (S)-2 is found to be an excellent catalyst for the alkyne addition to aldehydes. In the presence of (S)-2 (20 mol %) and Me2Zn (2 equiv) in THF at room temperature, the addition of phenylacetylene to linear or branched aliphatic aldehydes and vinyl aldehydes gave various propargylic alcohols with 89−96% ee.
发现
1,1'-联萘大环(S)-2是
炔烃加成醛的极佳催化剂。在室温下,在THF中存在(S)-2(20 mol%)和Me 2 Zn(2当量)的情况下,将
苯乙炔添加到直链或支链脂族醛和
乙烯基醛中,制得89-96%的各种炔
丙醇ee。