New Methods for the Synthesis of Phosphonic Analogues of Natural Compounds

Kolodiazhnyi, Oleg I.; Gryshkun, E.V.; Kolodiazhna, Anastasy O.; Kachkovskyi, Georgy O.; Kolodiazhna, Olga O.; Sheiko, S. G.; Zemlianoi, Viacheslav N.

doi:10.1080/10426507.2010.511359

Cited by 4 publications

(2 citation statements)

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“…Bisphosphonate 17 was isolated and purified by column chromatography on silica gel in a low yield (about 25 %) (Scheme 7). Thus, we have developed a relatively simple method for the synthesis of α-hydroxy-bispho sphonates, derivatives of terpenes, which are of interest as potential biologically active substances [11,12]. We will carry out research in this direction in the future.…”

Section: Methodsmentioning

confidence: 99%

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Catalytic phosphonylation of C=X electrophiles

Kolodiazhna¹,

Gryshkun²,

Kolodiazhna³

et al. 2020

Dopov. Nac. akad. nauk Ukr.

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A method for the catalytic phosphonylation of C = X electrophiles has been developed. Pyridinium perchlorate is an effective catalyst for the phosphonylation reaction of trialkyl phosphites with various electrophiles C = X (X = O, S, N). The reaction leads to the formation of corresponding α-substituted phosphonates in high yields. The reaction leading to the formation of bisphosphonates represents the highest interest. It was found that the nucleo philic attack of triethyl phosphite on the electron-deficient carbon of the C = X group leads to the formation of beta ine, which reacts with pyridinium perchlorate to form alkoxyphosphonium perchlorate and pyridine. Quasiphosphonium salt is unstable and decomposes to form phosphonate, alkene, and perchloric acid, which reacts with pyridine to regenerate pyridinium perchlorate. The intermediate formed from the pyridinium halide decomposes to form alkyl halide. The general strategy of the proposed method for introducing phosphonate groups into a polyprenyl mole cule consisted in the sequential treatment of hydroxyl-containing a compound with the Swern reagent with the con version of the C—OH group into a carbonyl one. Subsequent phosphonylation of the carbonyl-containing interme diate with the reagent (EtO)3P/[PyH] + ClO 4– leads to the formation of hydroxyalkylbisphosphonate. The synthe sized prenyl bisphosphonates have a pronounced biological activity. These include, for example, enolpyruvylshikimate-3- phosphate synthase (EPSP), farnesyl protein transferase (FPTase), as well as HIV protease, which are of interest as potential biologically active substances.

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Section: Methodsmentioning

confidence: 99%

“…Yield 60 %, bp 145 °С (0.1 mmHg). [(2E,6E)-1-hydroxy-3,7,11-trimethyldodeca-2,6,10-trienylidene]bisphosphonate (12). Pyridinium perchlorate (3 mmol) was added to a cold (0 °С) solution of 3 mmol of trimethyl phosphite and 2.5 mmol of ketophosphonate 11 in 3 ml of methylene chloride, and the mixture was left to stand for 24 h at room temperature.…”

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confidence: 99%