Anellierte Thiopyrone, 5. Mitt.1): Darstellung und Reaktionen von 3-Formyl-indeno[1,2-b]-, -[1]benzofuro[3,2-b]-, -[1]-benzothieno[3] ,2-b]thiopyronen 和 3-Formyl-thiopyrono[3,2-b]indolen
摘要:
Alternative Synthesen der Titelverbindungen werden vorgestellt。Die Konfiguration der aus den Hergestellten Oxime wird bewiesen und die Darstellung der korrespondierenden Nitrile und Carbonsäuren beschrieben。
Acid-catalyzed isomerization of 3-indolyl sulfides to 2-indolyl sulfides: first synthesis of 3-unsubstituted 2-arylthioindoles. Evidence for a complex intermolecular process
作者:Pierre Hamel、Yves Girard、Joseph G. Atkinson
DOI:10.1021/jo00035a029
日期:1992.4
The acid-catalyzed isomerization of 3-indolyl sulfides 1 to the corresponding 2-indolyl sulfides 4 provides the first synthesis of 3-unsubstituted 2-(arylthio)indoles, a hitherto unattainable class of compounds. When catalyzed by trifluoroacetic acid, the isomerization proceeds mainly via an intermolecular mechanism involving initial disproportionation to a 2,3-indolyl bis-sulfide 5 and an unsubstituted counterpart 6 followed by further interaction of these species to yield the rearranged isomer 4. A mechanism is proposed involving a role for the acid in the sulfenyl-transfer steps. This type of process also occurs, to a lesser extent, in the polyphosphoric acid catalyzed isomerization.
Nagarajan, K.; Arya, V. P.; Parthasarathy, T. N., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1981, vol. 20, # 8, p. 672 - 679
作者:Nagarajan, K.、Arya, V. P.、Parthasarathy, T. N.、Shenoy, S. J.、Shah, R. K.、Kulkarni, Y. S.
DOI:——
日期:——
NAGARAJAN, K.;ARYA, V. P.;PARTHASARATHY, T. N.;SHENOY, S. J.;SHAH, R. K.;+, INDIAN J. CHEM., 1981, 20, N 8, 672-679
作者:NAGARAJAN, K.、ARYA, V. P.、PARTHASARATHY, T. N.、SHENOY, S. J.、SHAH, R. K.、+