共查询到20条相似文献,搜索用时 15 毫秒
1.
Jiann-Kuan Luo Ronald F. Federspiel Raymond N. Castle 《Journal of heterocyclic chemistry》1996,33(3):923-926
The synthesis of two previously unknown polycyclic ring systems, benzo[h]naphtho[1′2′:4,5]-thieno[2,3-c]quinoline ( 1 ) and benzo[h]naphtho[1′,2′:4,5]thieno[2,3-c][1,2,4]triazolo[4,3-a]quinoline ( 2 ), was achieved via oxidative photocyclization of 1-chloro-N-(1-naphthyl)naphtho[2,1-b]thiophene-2-carboxamide ( 5 ). The total assignment of their 1H and 13C nmr spectra was determined by the concerted use of two-dimensional nmr methods. 相似文献
2.
Jiann-Kuan Luo Ronald F. Federspiel Raymond N. Castle Lyle W. Castle 《Journal of heterocyclic chemistry》1996,33(1):185-189
The synthesis of two previously unknown novel polycyclic heterocyclic ring systems via photocyclization is described. The structural assignment of the isomeric ring systems, 4 and 5 , was achieved by the total assignment of their 1H and 13C nmr spectra by the concerted usage of two-dimensional nmr methods. 相似文献
3.
The synthesis of three novel polycyclic heterocyclic ring systems are reported via photocyclization. The specific final products in these ring systems are: phenanthro[9′,10′:4,5]thieno[2,3-c]quinoline ( 13 ), benzo[h]-phenanthro[9′,10′:4,5]thieno[2,3-c]quinoline ( 14 ), and benzo[f]phenanthro[9′,10′:4,5]thieno[2,3-c]quinoline ( 15 ). 相似文献
4.
Jiann-Kuan Luo Andrew S. Zektzer Raymond N. Castle 《Journal of heterocyclic chemistry》1991,28(3):737-743
The synthesis of two novel polycyclic heterocyclic ring systems via photocyclization are reported. These are benzo[f]thieno[2′,3′:4,5]thieno[2,3-c]quinoline and benzo[A]thieno-[2′,3′:4,5]thieno[2,3-c]quinoline. The total assignment of their 1H- and 13C-nmr spectra was determined by utilizing two-dimensional nmr spectroscopic methods. 相似文献
5.
Jiann-Kuan Luo Ronald F. Federspiel Raymond N. Castle 《Journal of heterocyclic chemistry》1997,34(5):1597-1601
Photocyclization of 3-chloro-N-(3-phenanthryl)thieno[2,3-b]thiophene-2-carboxamide ( 5 ) yielded only one of the two possible structural isomers, thieno[3′,2′:4,5]thieno[2,3-c]naphtho[1,2-f]quinolin-6(5H)-one ( 6 ), which was further elaborated to afford the unsubstituted ring system 10 , its triazole 11 and tetrazole 12 . The structural confirmation of 10 was achieved by the total assignment of its 1H and 13C nmr spectra by the concerted utilization of two-dimensional nmr spectroscopic methods. 相似文献
6.
Steven L. Castle Jiann-Kuan Luo Hirotaka Kudo Raymond N. Castle Milton L. Lee 《Journal of heterocyclic chemistry》1988,25(5):1363-1365
The synthesis of two previously unknown heterocyclic ring systems, namely, thieno[3′,2′:4,5]thieno[2,3-c]-quinoline and thieno[2′,3′:4,5]thieno[2,3-c]quinoline is reported. These two novel ring systems were assembled by photocyclization of the appropriate anilides. 相似文献
7.
Jiann-Kuan Luo Ronald F. Federspiel Raymond N. Castle 《Journal of heterocyclic chemistry》1995,32(2):659-664
The synthesis of two previously unknown polycyclic heterocyclic ring systems via photocyclization is described. The unequivocal assignment of their proton and carbon spectra was achieved by utilizing two-dimensional nmr techniques. 相似文献
8.
A series of monomethoxynaphtho[1′,2′:4,5]thieno[2,3-c]quinolines has been prepared by photocyclization of the appropriate N-methoxyphenyl-1-chloronaphtho[2,1-b]thiophene-2-carboxamides. Some of the lactams obtained were converted into the thiolactams and their S-methyl derivatives. The lactams were also converted into the corresponding 6-chloro derivatives. Some of these were catalytically dechlorinated into the monomethoxynaphtho[1′,2′:4,5]thieno[2,3-c]quinolines which were then quaternized into the N-methyl quaternary salts. 相似文献
9.
Aileen Pfleider Halverson Lyle W. Castle Raymond N. Castle 《Journal of heterocyclic chemistry》1996,33(1):179-183
Naphtho[1′,2′:4,5]thieno[2,3-c][1,10]phenanthroline and naphtho[2′,1′:4,5]thieno[2,3-c][1,10]phenanthroline, two novel polycyclic heterocyclic ring systems, have been synthesized in four steps from known starting materials. The total 1H nmr spectral assignments were made using a COSY experiment to identify the spin systems. 相似文献
10.
Aileen Pfleider Halverson Lyle W. Castle Raymond N. Castle 《Journal of heterocyclic chemistry》1996,33(1):119-122
The synthesis of thieno[2′,3′:4,5]thieno[2,3-c][1,10]phenanthroline ( 5 ) and thieno[3′,2′:4,5]thieno-[2,3-c][1,10]phenanthroline ( 10 ) are described. Each compound was obtained in four steps from known starting materials. The basic skeleton of the molecule and of the phenanthroline ring were formed via photocyclization. The total assignment of 1H-nmr spectra was accomplished with the aid of two-dimensional nmr methods. 相似文献
11.
The synthesis of a previously unknown polycyclic heterocyclic ring system, dibenzo[f,h]phenanthro-[9′,10′:4,5]thieno[2,3-c]quinoline ( 4 ), was accomplished via photocyclization of the appropriate amide followed by chlorination. Substitution of the chlorine atom with hydrazine followed by removal of the hydrazine moiety with 10% copper sulfate solution afforded the parent ring system 4 . The unequivocal assignment of its highly congested 1H and 13C spectra was accomplished by utilizing two-dimensional nmr methods. 相似文献
12.
The synthesis of the novel naphtho[2′,1′:4,5]thieno[2,3-c]quinoline (11) ring system and four of the isomeric monomethyl derivatives is described. 相似文献
13.
Benzo[h]naphtho[1′2′:4,5]thieno[2,3-c][1,6]naphthyridine, a novel polycyclic heterocyclic ring system, has been synthesized as the 14-methyl derivative 8 in four steps from known intermediates. The structure of 8 is supported by assignment of the proton and the protonated carbon atoms by 2D-nmr techniques (COSY and a carbon-hydrogen one-bond coupling experiment). 相似文献
14.
Jiann‐Kuan Luo Maria P. Cabal Ronald F. Federspiel Raymond N. Castle 《Journal of heterocyclic chemistry》2000,37(4):997-1001
Photocyclization of 3‐chloro‐N‐(9‐phenanthryl)benzo[b]‐thiophene‐2‐carboxamide ( 3 ) and 3‐chloro‐N‐(9‐phenanthryl)‐naphtho[1,2‐b]thiophene‐2‐carboxamide ( 10 ) yielded dibenzo[f,h]benzothieno[2,3‐c]‐quinolin‐10(9H)‐one ( 4 ) and dibenzo[f,h]naphtho[2′,1′:4,5]thieno[2,3‐c]quinolin‐10(9H)‐one ( 11 ), respectively. Further elaboration of the lactams provided three novel unsubstituted new ring systems. 相似文献
15.
The synthesis of two previously unknown unsubstituted heterocyclic ring systems namely, benzo[h][1]benzothieno[2,3-c]quinoline ( 6 ) and benzo[f][1]benzothieno[2,3-c]quinoline ( 12 ) is reported. These two novel ring systems have been assembled by photocyclization of the appropriate amides. 相似文献
16.
Kenji Sasaki Osamu Tokuda Takashi Hirota Jiann-Kuan Luo Ronald F. Federspiel Raymond N. Castle 《Journal of heterocyclic chemistry》1997,34(6):1829-1832
The polycyclic heterocyclic compound with a novel ring system, 15-chloro[1]benzothieno[2″,3″:3′,4′]-naphtho[1′,2′:4,5]thieno[2,3-c]quinoline was synthesized via photocyclization of 3-chloro-N-phenyl[1]-benzothieno[2′,3′:3,4]naphtho[2,1-b]fhiophene-2-carboxamide followed by chlorination with phosphorus oxychloride. The assignment of its 1H and 13C nmr spectra was accomplished by utilizing two-dimensional nmr methods. 相似文献
17.
John P. Paolini Frank P. Palopoli Louis J. Lendvay John Huffman 《Journal of heterocyclic chemistry》1987,24(3):549-553
The reaction of 2-aminopyridine, o-phthaldehydic acid and potassium cyanide gave pyrido[2′,1′:2,3]imidazo[4,5-c]isoquinolin-5(6H)-one, which upon treatment with propargylbromide, yielded both O and N alkylated products. 2-Aminopyridine, o-phthaldehyde and potassium cyanide gave 1-cyano-2-(2-pyridyl)isoindole which rearranged in acid to give the previously unreported parent pyrido[2′,1′:2,3]imidazo[4,5-c]isoquinole. Structures were confirmed using uv, ir, nmr and x-ray spectroscopy. 相似文献
18.
Takashi Hirota Kimiko Katsuta Tetsuto Namba Kenji Sasaki Shhei Hayakawa 《Journal of heterocyclic chemistry》1985,22(1):187-190
Benz[h]imidazo[1,2-c]quinazolinium-l-olate (5) and benzo[h]pyrrolo[1′,2′:3,4]imidazo[1,2-c]quinazolinium-8-olate (9) having novel meso-ionic ring systems were synthesized by the reaction of N-(5,6-dihydrobenzo[h]-quinazolin-4-yl)amino acids with acetic anhydride. 相似文献
19.
Starting with 2-substituted quinoline-3,4-dicarboxylic acids, a series of substituted 1,2,3,4-tetrahydropyrimido[4,5-c]quinolinone-3-thiones were obtained. The latter compounds were converted to the three novel polyazasteroid series: 1,2,4-Triazolo[3′,4′:2,3]pyrimido[4,5-c]-quinolin-11(12H)ones, imidazo[2′,1′:2,3]pyrimido[4,5c]quinolin-11(12H)ones and 2,3-dihydroimidazo[2′,1′:2,3]pyrimido[4,5-c]quinolin-11(12H)ones. The intermediate 3-hydrazino-1,2-dihydropyrimido[4,5-c]quinolinones and nitrous acid gave the 3-azido derivatives rather than the tetrazolo compounds. 相似文献
20.
Reaction of 1-oxo-3-dialkylamino-1 H-naphtho[2,1-b]pyrans with N,N-dimethylformamide in the presence of phosphorus oxychloride afforded the corresponding 1-oxo-2-formyl-3-dialkyl-amino-1H-naphtho[2,1-b]pyrans. Condensation of 1-oxo-2-formyl-3-dimethylamino-1H-naphtho[2,1-b]pyran with hydrazine or monosubstituted hydrazines was found to lead to the formation of 8-alkyl(aryl)-1 1-oxo-8H,1 1H-naplitho[1′,2′:5,6] pyrano[2,3-c]pyrazoles through the intermediate hydrazones and subsequent cyclization. The same result was achieved starting from other 3-dialkylamino derivatives but in a lower yield. 相似文献