17087-84-2Relevant academic research and scientific papers
Highly regioselective and stereoselective synthesis of C-Aryl glycosidesvianickel-catalyzedortho-C-H glycosylation of 8-aminoquinoline benzamides
Shi, Wei-Yu,Ding, Ya-Nan,Zheng, Nian,Gou, Xue-Ya,Zhang, Zhe,Chen, Xi,Luan, Yu-Yong,Niu, Zhi-Jie,Liang, Yong-Min
supporting information, p. 8945 - 8948 (2021/09/10)
C-Aryl glycosides are of high value as drug candidates. Here a novel and cost-effective nickel catalyzedortho-CAr-H glycosylation reaction with high regioselectivity and excellent α-selectivity is described. This method shows great functional group compatibility with various glycosides, showing its synthetic potential. Mechanistic studies indicate that C-H activation could be the rate-determining step.
Straightforward synthesis of protected 2-hydroxyglycals by chlorination-dehydrochlorination of carbohydrate hemiacetals
Choutka, Jan,Kratochvíl, Michal,Parkan, Kamil,Pohl, Radek,Zyka, Jakub
supporting information, (2020/08/24)
A straightforward and scalable method for the synthesis of protected 2-hydroxyglycals is described. The approach is based on the chlorination of carbohydrate-derived hemiacetals, followed by an elimination reaction to establish the glycal moiety. 1,2-dehy
Synthesis of Bioactive Side-Chain Analogues of TAN-2483B
Somarathne, Kalpani K.,McCone, Jordan A. J.,Brackovic, Amira,Rivera, José Luis Pinedo,Fulton, J. Robin,Russell, Euan,Field, Jessica J.,Orme, Christopher L.,Stirrat, Hedley L.,Riesterer, Jasmin,Teesdale-Spittle, Paul H.,Miller, John H.,Harvey, Joanne E.
supporting information, p. 1230 - 1237 (2019/02/07)
The fungal metabolite TAN-2483B has a 2,6-trans-relationship across the pyran ring of its furo[3,4-b]pyran-5-one core, which has thwarted previous attempts at its synthesis. We have now developed a chiral pool approach to this core and prepared side-chain
Efficient Synthesis of α-Glycosyl Chlorides Using 2-Chloro-1,3-dimethylimidazolinium Chloride: A Convenient Protocol for Quick One-Pot Glycosylation
Tatina, Madhu Babu,Khong, Duc Thinh,Judeh, Zaher M. A.
supporting information, p. 2208 - 2213 (2018/06/04)
A mild and convenient method for the synthesis of α-glycosyl chlorides in high 80–96 % yields within 15–30 min using 2-chloro-1,3-dimethylimidazolinium chloride (DMC) is disclosed. The method has a wide substrate scope and is compatible with labile OH protecting groups, including benzyl, acetyl, benzoyl, isopropylidene, benzylidene, TBDMS (tert-butyldimethylsilyl), and TBDPS (tert-butyldiphenylsilyl) groups. The excellent α selectivity obtained in this reaction is attributed to in-situ isomerization of β-glycosyl chlorides to the more stable α-glycosyl chlorides, as demonstrated by 1H NMR spectroscopic studies. Disarmed sugars with OBz or OAc groups at C-2 were chlorinated at a faster rate but ismomerized (β→α) at a slower rate than armed sugars with an OBn group at C-2. More importantly, the method enables highly desirable one-pot glycosylation reactions to take place, thus allowing efficient syntheses of disaccharides and simple O-glycosylated sugars in high overall yields without the need for separation or purification of the α-glycosyl chloride donors. This method will be especially useful for direct glycosylation reactions using glycosyl chloride donors that are unstable upon separation and purification.
Synthesis of triazolylmethyl-linked nucleoside analogs via combination of azidofuranoses with propargylated nucleobases and study on their cytotoxicity
Halay, Erkan,Ay, Emriye,?alva, Emine,Ay, Kadir,Karay?ld?r?m, Tamer
, p. 158 - 166 (2018/04/02)
[Figure not available: see fulltext.] Copper(I)-catalyzed azide–alkyne 1,3-dipolar cycloaddition reactions (CuAAC) between azidofuranoses and propargyl-nucleobases were carried out in the presence of CuSO4·5H2O and sodium ascorbate as catalytic system to provide the corresponding 1,4-disubstituted-1,2,3-triazole-bridged nucleoside analogs in good yields. Twelve new sugar-based triazolylmethyl-linked nucleoside analogs were synthesized and screened for their cytotoxic activity against MDA-MB-231, Hep3B, PC-3, SH-SY5Y, and HCT-116 cancer cell lines and control cell line (L929). Most of the compounds were moderately effective against all the cancer cell lines assayed. Particularly, among the tested compounds, 1,2,3-triazole-linked 5-fluorouracil–mannofuranose hybrid was found to be the most potent cytotoxic agent against HCT-116, Hep3B, SH-SY5Y cells with IC50 values of 35.6, 71.1, and 75.6 μM, respectively. None of the triazolylmethyl-linked nucleoside analogs exhibited cytotoxic effect against the control cells L929.
Solvent-free synthesis of glycosyl chlorides based on the triphenyl phosphine/hexachloroacetone system
Traboni, Serena,Liccardo, Federica,Bedini, Emiliano,Giordano, Maddalena,Iadonisi, Alfonso
, p. 1762 - 1764 (2017/04/13)
Glycosyl chlorides, useful as glycosyl donors in glycoside synthesis and precursors in organic synthesis, can be easily prepared under solvent-free conditions by exposing a sugar hemiacetal to an equimolar mixture of PPh3 and hexachloroacetone
Synthesis of furanoid and pyranoid C-1 aryl glycals by reaction of glycosyl chlorides with organolithium reagents
Goemez, Ana M.,Casillas, Marta,Rodriguez, Benjamin,Valverde, Serafin,Loepez, J. Cristoebal
experimental part, p. 288 - 302 (2010/08/07)
Furanosyl and pyranosyl chlorides react with aryllithium derivatives, obtained by directed ortho-lithiation of activated arenes, to give C-1 aryl glycals in moderate yields.
Synthesis of C-1 alkyl and aryl glycals from pyranosyl or furanosyl chlorides by treatment with organolithium reagents
Gomez, Ana M.,Pedregosa, Ana,CasiIIas, Marta,Uriel, Clara,Lopez, J. Cristobal
supporting information; experimental part, p. 3579 - 3588 (2009/10/26)
Glycosyl chlorides, with ether or isopropylidene acetal protecting groups, readily available from furanoses or pyranoses, can be conveniently transformed into C-1 alkyl or aryl glycals by reaction with alkyl or aryl organolithium reagents.
A mild and general method for preparation of α-glycosyl chlorides
Chang, Chih-Wei,Chang, Shih-Sheng,Chao, Chin-Sheng,Mong, Kwok-Kong T.
supporting information; experimental part, p. 4536 - 4540 (2009/12/03)
A mild and efficient chlorination method for production of glycosyl chlorides is first described which employs inexpensive trichlorotriazine (TCT) and DMF as a chlorination reagent and is compatible with typical acid-labile hydroxyl protecting functions. The scope and limitations, reaction mechanism and its application in the sequential glycosylations are discussed.
An approach to an enantioselective synthesis of crisamicin A via a novel double Hauser-Kraus annulation strategy
Andrey, Olivier,Sperry, Jonathan,Larsen, Uffe S.,Brimble, Margaret A.
, p. 3912 - 3927 (2008/09/20)
A double Hauser-Kraus annulation between biscyanophthalide 4 and the d-mannose derived enone 39 provides access to an advanced intermediate 54 that is an excellent scaffold to effect an enantioselective total synthesis of crisamicin A 1.
