Ethyl 1,4-Dihydro-4-oxo-1,8-naphthyridine-3-carboxylates by a Tandem SNAr-Addition-Elimination Reaction

被引:11
作者
Bunce, Richard A. [1 ]
Nammalwar, Baskar [1 ]
机构
[1] Oklahoma State Univ, Dept Chem, Stillwater, OK 74078 USA
关键词
ANTIBACTERIAL AGENTS; QUINOLONES; ACIDS;
D O I
10.1002/jhet.917
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
A series of N-substituted 1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylate esters has been prepared in two steps from ethyl 2-(2-chloronicotinoyl)acetate. Treatment of the beta-ketoester with N,N-dimethylformamide dimethyl acetal in N,N-dimethylformamide (DMF) gave a 95% yield of the 2-dimethylaminomethylene derivative. Subsequent reaction of this beta-enaminone with primary amines in DMF at 120oC for 24 h then afforded the target compounds in 4782% yields by a tandem SNAr-addition-elimination reaction. Synthetic and procedural details as well as a mechanistic rationale are presented.
引用
收藏
页码:658 / 663
页数:6
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