THE SYNTHESIS OF NOVEL POLYCYCLIC HETEROCYCLIC RING-SYSTEMS VIA PHOTOCYCLIZATION .6. NAPHTHOTHIENONAPHTHYRIDINES

被引:24
作者
CASTLE, RN [1 ]
PAKRAY, S [1 ]
MARTIN, GE [1 ]
机构
[1] UNIV HOUSTON,COLL PHARM,DEPT MED CHEM,HOUSTON,TX 77304
关键词
D O I
10.1002/jhet.5570280835
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
Five novel polycyclic heterocyclic ring systems are reported via photocyclization. The specific final products in these ring systems are: naphtho[1',2':4,5]thieno[2,3-c][1,8)naphthyridin-6(5H)-one (5), naphtho[1',2':4,5]thieno[2,3-c][1,6]naphthyridin-6(5H)-one (6), naphtho[1',2':4,5]thieno[2,3-c]-1,5-naphthyridine (9), naphtho[1',2':4,5]thieno[2,3-c][1,2,4]triazolo[4,3-a]-1,5-naphthyridine (12), and naphtho[2',1':4,5]thieno[2,3-c]-1,5-naphthyridine (17). The direction of photocyclization to produce 9 was established from a zero quantum two-dimensional nmr spectroscopy experiment (ZQCOSY) using 6-chloronaphtho[1',2':4,5]thieno[2,3-c]-1,5-naphthyridine (8) as the model compound.
引用
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页码:1997 / 2003
页数:7
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