between (N,N-dimethylamino)pyridine and isocyanate unexpectedly produced a three-component mixture. By using this mixture as an unprecedented three-component catalyst system, a facile and selective bromolactamization of olefinic amides has been developed. The protocol confers enhanced selectivity of N- over O-cyclization, leading to the formation of a structurally diverse range of lactams including both small
(N,N-二甲基
氨基)
吡啶与
异氰酸酯之间的反应出乎意料地产生了三组分混合物。通过将该混合物用作空前的三组分催化剂体系,已经开发了烯烃酰胺的容易和选择性的
溴内酰胺化。该协议赋予了N-相对于O-环化更高的选择性,从而导致形成结构多样的内酰胺,包括中小环大小。