Transition Metal‐Catalyzed Synthesis of 3‐Coumaranone‐Containing NH‐Aziridines from 2
<i>H</i>
‐Azirines: Nickel(II) versus Gold(I)
作者:Pavel A. Sakharov、Nikolai V. Rostovskii、Alexander F. Khlebnikov、Olesya V. Khoroshilova、Mikhail S. Novikov
DOI:10.1002/adsc.201900366
日期:2019.7.11
catalytic nucleophilic addition reaction of 3‐hydroxybenzofuran‐2‐carboxylic acid derivatives to 2H‐azirines for the high‐yield synthesis of NH‐aziridines with a 3‐coumaranone substituent has been developed. The Ph3PAuNTf2‐catalyzed reaction is diastereoselective to give predominantly (RS,SR)‐isomer of aziridine in good yield. The Ni(hfacac)2‐catalyzed reaction affords aziridines in up to 98% yield and low
已开发出3-羟基苯并呋喃-2-羧酸衍生物与2 H-叠氮基的亲核催化加成反应,可高产合成带有3-coumaranone取代基的NH-氮丙啶。Ph 3 PAuNTf 2催化的反应是非对映选择性的,主要以高收率得到氮丙啶的(RS,SR)-异构体。Ni(hfacac)2催化反应可提供氮丙啶,产率高达98%,低或中等非对映选择性,在某些情况下与金(I)催化反应相反。Ph 3 PAuNTf 2对于受位阻的叠氮基以及带有吸电子基团的苯并呋喃,其效果很好,而Ni(hfacac)2是制备具有重氮乙酰基取代基的氮丙啶的首选催化剂。后一种化合物可以用作通过布氏环扩环反应合成稠合氮丙啶的底物。