Flash vacuum pyrolysis of 2,2-dioxo-1H,3H-pyrrolo[1,2-c]thiazoles and 2-vinyl-1H-pyrroles
摘要:
The flash vacuum pyrolysis of new 1,1-dimethyl- and 1-methyl-1H,3H-pyrrolo[1,2-c]thiazole-2,2-dioxides gave penta-substituted 2-vinyl-1H-pyrroles via sigmatropic [1,8]-H shift of the corresponding azafulvenium methide intermediates. In some cases these 1H-pyrroles underwent rearrangement to 2-allyl-1H-pyrroles. Di-substituted 2-vinylpyrroles have also been prepared and their reactivity studied. Under FVP N-benzyl-pyrrol-2-ylpropenoates were converted into 3H-pyrrolizin-3-ones. On the other hand, microwave-assisted reaction of 1-benzyl-2-vinyl-1H-pyrrole gave a 4,5,6,7-tetrahydro-1H-indole derivative. (C) 2008 Elsevier Ltd. All rights reserved.
Flash vacuum pyrolysis of 2,2-dioxo-1H,3H-pyrrolo[1,2-c]thiazoles and 2-vinyl-1H-pyrroles
摘要:
The flash vacuum pyrolysis of new 1,1-dimethyl- and 1-methyl-1H,3H-pyrrolo[1,2-c]thiazole-2,2-dioxides gave penta-substituted 2-vinyl-1H-pyrroles via sigmatropic [1,8]-H shift of the corresponding azafulvenium methide intermediates. In some cases these 1H-pyrroles underwent rearrangement to 2-allyl-1H-pyrroles. Di-substituted 2-vinylpyrroles have also been prepared and their reactivity studied. Under FVP N-benzyl-pyrrol-2-ylpropenoates were converted into 3H-pyrrolizin-3-ones. On the other hand, microwave-assisted reaction of 1-benzyl-2-vinyl-1H-pyrrole gave a 4,5,6,7-tetrahydro-1H-indole derivative. (C) 2008 Elsevier Ltd. All rights reserved.
Synthesis and biological evaluation of new naphthoquinone-containing pyrrolo-thiazoles as anticancer agents
作者:Susana M. M. Lopes、Mafalda Laranjo、Arménio C. Serra、Ana Margarida Abrantes、António M. d'A. Rocha Gonsalves、Maria Filomena Botelho、Ana Matos Beja、Manuela Ramos Silva、Teresa M. V. D. Pinho e Melo
DOI:10.1002/jhet.396
日期:——
Abstractmagnified image
Naphthoquinones undergo 1,3‐dipolar cycloaddition with bicyclic münchnones generated from thiazolidines affording new pyrrolo‐thiazoles with a fused quinone nucleus. The products were obtained as single enantiomers in good yields. These benzo[f]thiazolo[4,3‐a]isoindole‐6,11(1H,3H)‐diones are comprised of four fused rings and present a very planar structure. The evaluation of their anticancer activity against melanoma A375 and colorectal adenocarcinoma WiDr human cell lines showed only moderate activity but gave insight into the modeling of new structures. [Color figure can be viewed in the online issue, which is available at www.interscience.wiley.com.] J. Heterocyclic Chem., (2010).