18439-34-4Relevant academic research and scientific papers
Conformational analysis of cyclic phosphates derived from 5-C′ substituted 1,2-O-isopropylidene-α-D-xylofuranose derivatives
Sartillo-Piscil, Fernando,Cruz, Silvano,Sánchez, Mario,H?pfl, Herbert,De Parrodi, Cecilia Anaya,Quintero, Leticia
, p. 4077 - 4083 (2003)
Twelve 2-phenoxy-2-oxo-1,3,2-dioxaphosphorinanes fused with a 1,2-O-isopropylidene-α-D-xylofuranose moiety in cis orientation and substituted at the C′5 position were prepared in two steps from commercially available diacetone-α-D-glucose. Their conformations, and configurations were determined by 1H and 31P NMR and X-ray crystallographic techniques. Both, chair-twisted-chair and chair-boat equilibria were observed in solution. We observed that the strong anisotropic shielding effect of the benzene ring in the phenoxy group generates an upfield shift of the H1 hydrogen atom, when the cyclic phosphates adopt a boat conformation. This is due to a relative cis-orientation of the P-phenoxy group and the H1 proton of the 1,2-O-isopropylidene-α-D-xylofuranose moiety. Therefore, the configuration of the phosphorus center (SP or RP) can be determined by 1H NMR spectroscopy. Interestingly, the crystal structure of one of the cyclic phosphates exhibits two independent molecules in the asymmetric unit, one with a chair and the other one with a boat conformation.
Divergent total synthesis of crassalactones B and C and evaluation of their antiproliferative activity
Benedekovi?, Goran,Kova?evi?, Ivana,Popsavin, Mirjana,Francuz, Jovana,Koji?, Vesna,Bogdanovi?, Gordana,Popsavin, Velimir
, p. 4581 - 4589 (2015/06/08)
A divergent total synthesis of cytotoxic natural products (+)-crassalactones B (2) and C (3) has been achieved by utilizing diacetone d-glucose (4) as a chiral precursor. The key steps of the synthesis of both targets 2 and 3 were a stereo-selective addit
Conformationally constrained goniofufurone mimics as inhibitors of tumour cells growth: Design, synthesis and SAR study
Benedekovi?, Goran,Francuz, Jovana,Kova?evi?, Ivana,Popsavin, Mirjana,Sre?o Zelenovi?, Bojana,Koji?, Vesna,Bogdanovi?, Gordana,Divjakovi?, Vladimir,Popsavin, Velimir
supporting information, p. 449 - 458 (2014/07/07)
Synthesis of conformationally restricted (+)-goniofufurone (1) and 7-epi-(+)-goniofufurone (2) analogues, with embedded O-isopropylidene, O-methylidene or cyclic carbonate functions is disclosed starting from d-glucose. A number of potential bioisosteres
Stereoselective total synthesis of styryl-lactones: (+)-crassalactones B and C, (+)-howiionol A, (+)-tricinnamate, (+)-goniofufurone and (+)-dicinnamoyl goniofufurone
Sharma, Gangavaram V.M.,Mallesham, Samala
experimental part, p. 2646 - 2658 (2011/02/16)
The total synthesis of (+)-crassalactone B, (+)-crassalactone C, (+)-howiionol A, (+)-tricinnamate, (+)-goniofufurone, and (+)-dicinnamoyl goniofufurone is achieved by a 'chiron approach' starting from diacetone d-glucose (DAG). Mitsunobu inversion, Wittig olefination and ring closing metatheses were used as key steps for (+)-howiionol A and (+)-tricinnamate. Meldrum's acid was used for the synthesis of (+)-crassalactone C, (+)-goniofufurone, and (+)-dicinnamoyl goniofufurone. Yamaguchi esterification was used for (+)-crassalactone B, while a Grignard reaction followed by concomitant deallylation was first reported in the synthesis of (+)-dicinnamoyl goniofufurone.
Divergent synthesis of cytotoxic styryl lactones isolated from Polyalthia crassa. The first total synthesis of crassalactone B
Popsavin, Velimir,Benedekovi?, Goran,Popsavin, Mirjana,Koji?, Vesna,Bogdanovi?, Gordana
scheme or table, p. 3426 - 3429 (2010/08/22)
The first total synthesis of (+)-crassalactone B (2) and a new syntheses of (+)-crassalactone C (3) has been achieved starting from d-glucose. The natural products 2 and 3 can be selectively accessed by changing the conditions for TBDPS cleavage in the fi
Six-membered ring phosphates and phosphonates as model compounds for cyclic phosphate prodrugs: Is the anomeric effect involved in the selective and spontaneous cleavage of cyclic phosphate prodrugs?
Cruz-Gregorio, Silvano,Rodriguez-Palacios, Vicente,H?pfl, Herbert,Quintero, Leticia,Sartillo-Piscil, Fernando
supporting information; experimental part, p. 197 - 205 (2009/04/10)
(Chemical Equation Presented) In recent years, several six-membered ring phosph(on)ates and phosphonamides have been reported as potent prodrugs against liver diseases such as hepatitis B and C and also as antitumor agents. Apparently, the success for the
Application of the reaction of D-glucose with meldrum's acid: Total synthesis of the styryl lactones (+)-goniofufurone and (+)-7-epi- goniofufurone
Bruns, Rainer,Wernicke, Angelika,Koell, Peter
, p. 9793 - 9800 (2007/10/03)
The syntheses of the styryl lactones (+)-goniofufurone (1) and (+)-7- epi-goniofufurone (2) from D-glucose are presented. The key steps are the formation of the lactone moiety by reaction of the hemiacetals 15 and 16 with meldrum's acid (3) and the addition of phenylmagnesium bromide to the aldehydes 9 or 12. In the last case, we obtained the L-ido and D-gluco configurated products 13 and 14 in a 3:1 mixture. However, addition of ZnCl2 shifted the diastereomeric ratio towards the desired compound 14.
