316828-32-7Relevant articles and documents
Total synthesis of (-)-fumiquinazolines A, B, C, E, H, and I. Approaches to the synthesis of fiscalin A
Snider, Barry B.,Zeng, Hongbo
, p. 545 - 563 (2007/10/03)
The first syntheses of (-)-fumiquinazolines A, B, and I, which proceed in 14 steps from protected tryptophan, anthranilic acid, leucine, and alanine in 7% overall yield, are described. Tricycle 30 was formed by a palladium-catalyzed cyclization. Oxidation of 30a with saccharine-derived oxaziridine 21 for fumiquinazolines A and B and oxidation of 30b with dimethyldioxirane for fumiquinazoline I selectively formed the appropriate imidazoindolone stereoisomers. Application of the Ganesan-Mazurkiewicz cyclization completed the syntheses. Efficient 14-step syntheses of (-)-fumiquinazolines C (7) and E (3) and a 15-step synthesis of (-)-fumiquinazoline H (8) using FmocNHCH(CH2SePh)CO2H as a dehydroalanine precursor that spontaneously eliminated benzeneselenol without oxidation under the cyclization conditions are also reported. Model 86 for fiscalins A with the H and OH anti to each other has been prepared, but the procedure that worked for the model failed with the fully functionalized side chain.
Total Syntheses of (-)-Fumiquinazolines C, E, and H
Snider, Barry B.,Zeng, Hongbo
, p. 1087 - 1090 (2007/10/03)
matrix presented Total syntheses of the heptacyclic fumiquinazolines C and H have been accomplished efficiently using FmocNHCH(CH2SePh)CO2H as the precursor for the requisite dehydrofumiquinazoline.
Total syntheses of (-)-fumiquinazolines A, B, and I.
Snider,Zeng
, p. 4103 - 4106 (2007/10/03)
[structure] The first total syntheses of (-)-fumiquinazolines A, B, and I have been accomplished efficiently using the Pd-catalyzed cyclization of an iodoindole carbamate to construct the imidazoindolone moiety and the dehydrative cyclization of a diamide