Direct Synthesis of Highly Substituted Pyrroles and Dihydropyrroles Using Linear Selective Hydroacylation Reactions
作者:Manjeet K. Majhail、Paul M. Ylioja、Michael C. Willis
DOI:10.1002/chem.201600311
日期:2016.6.1
diphosphine ligands, such as (Cy2 P)2 NMe or bis(diphenylphosphino)methane (dppm), are effective at catalysing the union of aldehydes and propargylic amines to deliver the linear hydroacylation adducts in good yields and with high selectivities. In situ treatment of the hydroacylation adducts with p-TSA triggers a dehydrative cyclisation to provide the corresponding pyrroles. The use of allylic amines, in place
含有小咬角二膦配体(例如 (Cy2 P)2 NMe 或双(二苯基膦)甲烷 (dppm))的铑 (I) 催化剂可有效催化醛和炔丙胺的结合,以良好的方式生成线性加氢酰化加合物。产率和高选择性。用 p-TSA 对加氢酰化加合物进行原位处理会引发脱水环化,从而提供相应的吡咯。使用烯丙胺代替炔丙底物可产生官能化的二氢吡咯。加氢酰化反应也可以在级联过程中与使用芳基硼酸的Rh(I)催化的Suzuki型偶联结合起来,提供高度取代的吡咯的三组分组装体。