Synthesis of Methyl 5-Aryl-3-oxo-4-pentenoates and Novel Substituted Cyclopentenones
作者:C. V. Asokan、S. Bhattacharji、H. Ila、H. Junjappa
DOI:10.1055/s-1988-27543
日期:——
The cinnamoyl- (1a-j) and (5-phenyl-2,4-pentadienoyl)- (1k) ketene dithioacetals are shown to undergo methanolysis in the presence of ether-boron trifluoride complex and mercury(II) chloride to the corresponding methyl 5-aryl-3-oxo-4-pentenoates 2a-j and 3-oxo-7-phenyl- 4,6-heptadienoate (2k), respectively, in good yields. However, the corresponding (2-methylcinnamoyl)ketene dithioacetals 3a-f, under identical reaction conditions, undergo Nazarov cyclization to give the corresponding substituted cyclopentenones 4a-f.
A FACILE SYNTHESIS OF β-OXOTHIOLCARBOXYLATES FROM α-OXOKETENEDITHIOACETALS<sup>*</sup>
作者:Satheesh K. Nair、C. V. Asokan
DOI:10.1081/scc-100104056
日期:2001.1
alpha -Oxoketenedithioacetals and alkenoyl ketenedithioacetals underwent facile, boron trifluoride etherate assisted partial hydrolysis in dioxane to afford beta -oxothiolcarboxylates and gamma,delta -unsaturated beta -oxothiolcarboxylates, respectively, in good yields.
Singh, L. W.; Ila, H.; Junjappa, H., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1987, vol. 26, # 1-12, p. 607 - 610
作者:Singh, L. W.、Ila, H.、Junjappa, H.
DOI:——
日期:——
MYRBOH, B.;ASOKAN, C. V.;ILA, H.;JUNJAPPA, H., SYNTHESIS, BRD, 1984, N 1, 50-51
作者:MYRBOH, B.、ASOKAN, C. V.、ILA, H.、JUNJAPPA, H.
DOI:——
日期:——
SINGH, L. W.;ILA, H.;JUNJAPPA, H., INDIAN J. CHEM., 26,(1987) N 7, 607-610