PYRIDAZINES .54. ON THE SYNTHESIS OF PYRIDAZINE-FUSED S-HETEROCYCLES - THIENO[2,3-C]PYRIDAZINE, PYRIMIDO[4',5'-4,5]THIENO[2,3-C]PYRIDAZINE, AND PYRIDAZINO[3,4-B][1,4]BENZOTHIAZINE

被引:10
|
作者
CZECH, K [1 ]
HAIDER, N [1 ]
HEINISCH, G [1 ]
机构
[1] UNIV VIENNA,INST PHARMACEUT CHEM,A-1090 VIENNA,AUSTRIA
来源
MONATSHEFTE FUR CHEMIE | 1991年 / 122卷 / 05期
关键词
3-CHLORO-4-PYRIDAZINECARBONITRILE; REACTIONS WITH S-NUCLEOPHILES; PYRIDAZINO[3,4-B]-[1,4]BENZOTHIAZINE; PYRIMIDO[4',5'-4,5]THIENO[2,3-C]PYRIDAZINE; THIENO[2,3-C]PYRIDAZINE DERIVATIVES;
D O I
10.1007/BF00809662
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Starting from 3-chloro-4-pyridazinecarbonitrile (1), the thienopyridazine derivatives 2 and 3 were prepared. Condensation of 3 with triethyl orthoformate afforded the novel tricyclic system 4. Reaction of 1 with 2-aminothiophenol, followed by treatment with NaH/DMSO was found to give the diaza-phenothiazine 6 instead of the expected condensed thiazepine.
引用
收藏
页码:413 / 418
页数:6
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