The use of N‐alkoxyacrylamides in a domino aza‐Michael/intramolecular‐Michael reaction for the synthesis of δ‐lactams is presented. This base‐catalyzed process operates under mild conditions and the polysubstituted aza‐heterocycles are isolated in good yields with good to excellent stereocontrol.
Divergent Reactivity in Cu<sup>II</sup>-Catalyzed Oxidative Coupling between Indole/Tryptamine Derivatives and β-Arylacrylic Acids
作者:Wei Cao、Jinbao Fan、Linyang Yan、Guangyao Zeng、Jinjin Ma、Yajing Wang、Yingjun Zhou、Xu Deng
DOI:10.1021/acs.orglett.9b03697
日期:2019.12.6
Condition-controlled divergent oxidativecoupling reactions between indole/tryptamine derivatives and β-arylacrylic acids with the catalysis of copper(II) have been developed. Specifically, a formal Michael addition/dehydration sequence between indoles and β-arylacrylic acids occurred in the presence of catalytic CuBr2 in CH3CN under air, thus affording highly functionalized 2,3-dihydro-1H-pyrrolo[1
已经开发出条件控制的吲哚/色胺衍生物与β-芳基丙烯酸之间的氧化偶联反应,其催化铜(II)。具体而言,在空气中CH 3 CN中存在催化CuBr 2时,吲哚与β-芳基丙烯酸之间存在正式的迈克尔加成/脱水序列,从而提供了高度官能化的2,3-二氢-1 H-吡咯并[1,2- a ]吲哚。相反,在将氧化剂改变为t BuOOH,将溶剂改变为DCM时,反应过程切换到空前的氧化偶合/环化级联反应,从而选择性地得到四环吡咯并[2,3- b ]二氢吲哚。
N-alkoxy-n-acylnitrenium ions in intramolecular aromatic addition reactions
作者:Stephen A. Glover、Andre Goosen、Cedric V. McClei、Johan L. Schoonraad
DOI:10.1016/s0040-4020(01)81665-3
日期:——
solvents. These intermediates readily cyclise onto aromatic nuclei on alkozy side-chains to give benzoxazines and benzoxazepines and on the acyl side-chains to give γ, δ and ϵ benzolactams. Spirane products are formed by ipso addition When a 4-methoxy substituent ia present on the side-chain aromatic rings. The yields and regioselectivities of these reactions have been ascribed to different transition structures