Synthesis of N-heterocycles, beta-amino acids, and allyl amines via aza-payne mediated reaction of ylides and hydroxy aziridines
申请人:Borhan Babak
公开号:US20090012120A1
公开(公告)日:2009-01-08
An ylide-based aza-Payne rearrangement of 2,3-aziridin-
1
-ols leads to an efficient process for the preparation of pyrrolidines. The aza-Payne rearrangement under the basic reaction conditions favors the formation of epoxy amines. Subsequent nucleophilic attack of the epoxide by the ylide yields a bis-anion, which upon a 5-exo-tet ring closure yields the desired pyrrolidine, thus completing the relay of the 3-membered the 5-membered nitrogen containing ring system. This process takes place with complete transfer of stereochemical fidelity, and can be applied to sterically hindered aziridinols.
基于叶立德的2,3-氮杂环丙醇的aza-Payne重排反应导致了一种高效的吡咯烷制备过程。在碱性反应条件下进行的aza-Payne重排有利于环氧胺的形成。叶立德对环氧化物的亲核攻击产生双阴离子,随后通过5-内攻环闭合产生所需的吡咯烷,从而完成了含3-成员和5-成员氮环的环的传递。这个过程完全保持立体化学的保真度,并可应用于立体位阻的氮杂环丙醇。