14661-10-0Relevant academic research and scientific papers
New diterpene glycosides of the fungus Acremonium striatisporum isolated from a Sea Cucumber
Afiyatullov, Shamil Sh.,Kalinovsky, Anatoly I.,Kuznetsova, Tatyana A.,Isakov, Vladimir V.,Pivkin, Mikhail V.,Dmitrenok, Pavel S.,Elyakov, George B.
, p. 641 - 644 (2007/10/03)
Three new diterpene glycosides, virescenosides O (1), P (2), and Q (3), have been isolated from a marine strain of Acremonium striatisporum KMM 4401 associated with the holothurian Eupentactafraudatrix. Their structures were determined on the basis of HRMALDIMS and NMR data as β-D-altropyranosido-19-isopimara-8(14),15-diene-7α,3β-diol (1), β-D-altropyranosido-19-7-oxoisopimara-8(9),15-diene-3β-ol (2), and β-D-mannopyranosido-19-isopimara-7,15-diene-3β-ol (3). The cytotoxic activity of the virescenosides was examined.
1,6-Anhydrofuranoses, XI. - 1,6-Anhydro-α-L-idofuranose
Koell, Peter,John, Hans-Georg,Schulz, Juergen
, p. 613 - 625 (2007/10/02)
The title compound 13 is prepared on different routes from suitable benzyl derivatives with gluco-configuration.Preparations use the susceptibility of axial 5-O-benzyl groups in this compounds to selective hydrogenolysis, thus allowing subsequent inversion of configuration in this position from D-gluco to L-ido by an oxidation/reduction sequence.Only 0.08percent of 13 are found in the equilibrium mixture of idose in acidic medium.It is shown with 4-C-methyltalose as example, that the amount of 1,6-anhydrofuranoses in these equilibria rises significantly by changing the hydroxy groups in 4-position from secondary to tertiary ones.
