Microwave-Assisted Synthesis of Spiro(cycloalkane thiazolo-s-tetrazine)
摘要:
Microwave irradiation of cyclic ketones with thiocarbohydrazide furnish the corresponding s-tetrazine derivatives 1a-d, which upon irradiation with chloroacetic acid and sodium acetate in acetic acid, give the corresponding thiazolidinone derivatives 2a-d. These derivatives 2a-d upon condensation with benzaldehyde afford the benzylidine derivatives 3a-d. The s-tetrazine derivatives 1a-d and 1,2dibromoethane upon irradiation gives the thiazolo-s-tetrazine derivatives 4a-d. The structures of 1-4 were established by IR, H-1 NMR, and C-13 NMR data.
Dual behavior of monothiocarbohydrazones in the cyclization with diethyl acetylene dicarboxylate (DEAD): synthesis of substituted 1,3-thiazolidin-4-ones
作者:Hasan I. Tashtoush、Fatima Abusahyon、Mohanad Shkoor、Mahmoud Al-Talib
DOI:10.1080/17415993.2011.608799
日期:2011.10.1
Aliphatic aldehydes and cyclohexanone reacted with thiocarbohydrazide to give exclusively 6-substituted-1,2,4,5-tetrazinane-3-thiones, which readily underwent cyclization with diethyl acetylene dicarboxylate to afford condensed thiazolidinones. On the other hand, cyclopentanone and cycloheptanone reacted under a similar sequence of reaction conditions to give 3-amino thiazolidin-4-ones.[GRAPHICS].
Mohan, Jag; Anjaneyulu, G S R; Verma, Pratima, Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1991, vol. 30, # 6, p. 624 - 627
作者:Mohan, Jag、Anjaneyulu, G S R、Verma, Pratima
DOI:——
日期:——
Pati, Anita; Sahu, Shankarshan; Patra, Manabendra, Journal of the Indian Chemical Society, 2012, vol. 89, # 5, p. 637 - 645