One-Pot Synthesis of Polysubstituted 3-Amino-2-oxo-2,7-dihydro-1H-azepines

被引:1
|
作者
Liao, Shengrong [1 ]
Qin, Chun [1 ]
Yao, Peifen [2 ]
Li, Jinsheng [1 ]
Zhou, Xuefeng [1 ]
Wang, Junfeng [1 ]
Huang, Zhishu [2 ]
Liu, Yonghong [1 ]
机构
[1] Chinese Acad Sci, South China Sea Inst Oceanol,Ctr Marine Microbiol, CAS Key Lab Trop Marine Bioresources & Ecol, Guangdong Key Lab Marine Mat Med,RNAM, Guangzhou 510301, Guangdong, Peoples R China
[2] Sun Yat Sen Univ, Sch Pharmaceut Sci, Guangzhou 510006, Guangdong, Peoples R China
来源
SYNTHESIS-STUTTGART | 2014年 / 46卷 / 05期
基金
中国国家自然科学基金;
关键词
alkyne; 3-aminoazepan-2-one; Michael addition; piperazine-2,5-dione; protecting groups; MYCOBACTERIUM-TUBERCULOSIS; BECKMANN REARRANGEMENT; INHIBITORS; LACTAMS; DERIVATIVES; METATHESIS; ALKALOIDS; CHEMISTRY; DISCOVERY; ANALOGS;
D O I
10.1055/s-0033-1340473
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
A facile and efficient synthesis of novel seven-membered heterocyclic derivatives containing 3-aminoazepan-2-one backbone is described using 1,4-protected piperazine-2,5-diones and alkynes as starting materials. The reaction may undergo Michael addition, unusual nucleophilic attack to an amide group, and keto-enol tautomerization. The reaction showed different reactivity when using substrates with different protecting groups: it had higher efficiency when using either alkanoyl-protecting group with cesium carbonate as the base, or benzoyl-protecting group with triethylamine as the base, but no reaction when using benzyl or allyl protecting groups with a variety of bases (Et3N, DBU, K2CO3, Cs2CO3, KHCO3, CsHCO3, and KOt-Bu).
引用
收藏
页码:621 / 628
页数:8
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