Two mechanistic pathways, that is, electrocyclization and electrophilic aromatic substitution, are operative in most intramolecular C−H amination reactions proceeding by metal nitrenoid catalysis. Reported here is an alternative mechanistic scaffold leading to benzofused δ‐lactams selectively. Integrated experimental and computational analysis revealed that the reaction proceeds by a key spirocyclization
Synthesis of Lactams via Ir-Catalyzed C–H Amidation Involving Ir-Nitrene Intermediates
作者:Jitian Liu、Wenjing Ye、Shuojin Wang、Junrong Zheng、Weiping Tang、Xiaoxun Li
DOI:10.1021/acs.joc.0c00157
日期:2020.3.20
We have developed a divergent strategy for the synthesis of five- and six-membered lactams via either an amidation of sp3 C-H bonds or electrophilic substitution of arenes via Ir-nitrene intermediates. With the employment of a readily available iridium catalyst in dichloromethane or hexafluoro-2-propanol, a wide range of lactams were synthesized in good to excellent yields with high selectivity.
METHOD FOR PRODUCING LACTAM COMPOUND, AND LACTAM COMPOUND PRODUCED THEREBY
申请人:INSTITUTE FOR BASIC SCIENCE
公开号:US20200331871A1
公开(公告)日:2020-10-22
The present invention relates to a method for producing a lactam compound from dioxazolone in the presence of a catalyst having a particular ligand, and to a lactam compound produced thereby, and can produce a lactam compound with excellent selectivity and an excellent yield by using the combination of a starting material having a particular functional group and a particular catalyst having a particular ligand.
developed as an efficient acyl nitrenium ion precursor. An iron-catalyzed acyl nitrenium-based ipso-addition and ortho-cyclization of arenes under photocatalysis is reported for the switchable synthesis of 3,4-dihydroquinolin-2-ones and 6,9-diene-2,8-diones. In the reaction, FeCl3 serves as the photocatalyst and SET reductant, and an acyl nitrenium ion was proposed as a key intermediate. It is assumed that
在这项工作中,N-酰氧基苯甲酰胺被开发为一种高效的酰基氮鎓离子前体。报道了在光催化下基于铁催化的酰基硝基的ipso加成和芳烃的邻位环化,用于可转换地合成 3,4-dihydroquinolin-2-one 和 6,9-diene-2,8-diones。在该反应中,FeCl 3作为光催化剂和 SET 还原剂,提出了一个酰基氮鎓离子作为关键中间体。假设 ipso 加成和邻环化的差异是由底物上的取代基实现的。对位取代芳烃的反应主要通过ipso加成和 CC迁移,而间位取代芳烃的迁移通过邻环化进行。
Method for producing lactam compound, and lactam compound produced thereby
申请人:INSTITUTE FOR BASIC SCIENCE
公开号:US11046661B2
公开(公告)日:2021-06-29
The present invention relates to a method for producing a lactam compound from dioxazolone in the presence of a catalyst having a particular ligand, and to a lactam compound produced thereby, and can produce a lactam compound with excellent selectivity and an excellent yield by using the combination of a starting material having a particular functional group and a particular catalyst having a particular ligand.