在苯和环己烷混合物中,在碘和空气存在下,将取代的2-([1]苯并噻吩-3-基)-3-苯基丙酸3a-c光环化,得到三种化合物苯并[ b ]萘的可分离混合物[2,1 - d ]噻吩-6-羧酸4a-c,6 H-苯并[ b ]萘并[2,3 - d ]噻喃-6-酮5a-c和10-甲氧基-2-甲基- 6 H-苯并[ b ]萘并[2,3 - d ]吡喃-6-一(6)。
Syntheses of thiopyrone and pyrone derivatives by photocyclization reaction of 3-aryl-2-( Benzothien-3-yl)propenoic acids
作者:Kenji Sasaki、Yasuyoshi Satoh、Takashi Hirota、Taiji Nakayama、Yoshinori Tominaga、Raymond N. Castle
DOI:10.1002/jhet.5570370446
日期:2000.7
Naphtho[1,2-b][1]benzothiophene-6-carboxylic acids, 6H-benzo[b]naphtho[2,3-d]thiopyran-6-ones and 6H-benzo[b]naphtho[2,3-d]pyran-6-ones were synthesized in one step by the photocyclization reaction of 3-aryl-2-([1]benzothien-3-yl)propenoic acids. The photocyclization reaction did not occur when the 3-aryl group contained the electron-withdrawing nitro group. The assignment of the 1H and 13C nmr spectra
萘并[1,2 b ] [1]苯并噻吩-6-羧酸,6 ħ -苯并[ b ]萘并[2,3- d ]噻喃-6-酮和6 ħ -苯并[ b ]萘并[2,通过3-芳基-2-([[1]苯并噻吩-3-基)丙酸的光环化反应,一步合成3- d ] pyran-6-one。当3-芳基含有吸电子硝基时,未发生光环化反应。6 H-苯并[ b ]萘[2,3 - d ]噻喃-6-one和6 H-苯并[ b ]萘[2,3-]的1 H和13 C nmr光谱的归属描述了通过二维nmr方法得到的d ] pyran-6-one。这两种化合物的H12的化学位移值之间的差异是由于分子的几何形状不同而引起的。
Photocyclization of 2-[1]benzothien-3-yl)-3-phenylpropenoic acids
作者:Yoshinori Tominaga、Lyle W. Castle、Raymond N. Castle
DOI:10.1002/jhet.5570330452
日期:1996.7
Photocyclization of the substituted 2-([1]benzothien-3-yl)-3-phenylpropenoic acids 3a-c in the presence of iodine and air in a benzene-cyclohexane mixture afforded a separable mixture of three compounds, benzo[b]naphtho[2,1-d]thiophene-6-carboxylic acids 4a-c, 6H-benzo[b]naphtho[2,3-d]thiopyran-6-ones 5a-c, and 10-methoxy-2-methyl-6H-benzo[b]naphtho[2,3-d]pyran-6-one (6).
在苯和环己烷混合物中,在碘和空气存在下,将取代的2-([1]苯并噻吩-3-基)-3-苯基丙酸3a-c光环化,得到三种化合物苯并[ b ]萘的可分离混合物[2,1 - d ]噻吩-6-羧酸4a-c,6 H-苯并[ b ]萘并[2,3 - d ]噻喃-6-酮5a-c和10-甲氧基-2-甲基- 6 H-苯并[ b ]萘并[2,3 - d ]吡喃-6-一(6)。
Tominaga, Yoshinori; Castle, Lyle W.; Castle, Raymond N., Journal of Heterocyclic Chemistry, 1993, vol. 30, # 3, p. 845 - 848
作者:Tominaga, Yoshinori、Castle, Lyle W.、Castle, Raymond N.