A. S. Sigachev | Researchain

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Featured researches published by A. S. Sigachev.

Russian Chemical Bulletin | 2003

Synthesis of 2-monofunctionalized 2,4,6,8-tetraazabicyclo[3.3.0]octane-3,7-diones

Angelina N. Kravchenko; E. Yu. Maksareva; Pavel A. Belyakov; A. S. Sigachev; K. Yu. Chegaev; K. A. Lyssenko; O. V. Lebedev; Nina N. Makhova

New (1R*,5S*)-2-R-2,4,6,8-tetraazabicyclo[3.3.0]octane-3,7-diones containing the terminal carboxy or hydroxy group in the substituent R were synthesized by cyclocondensation of 4,5-dihydroxyimidazolidin-2-one with 1-R-ureas. Single-crystal X-ray diffraction analysis showed that 2-carboxyethyl-2,4,6,8-tetraazabicyclo[3.3.0]octane-3,7-dione crystallizes as a racemate.

Russian Chemical Bulletin | 2007

Two-step α-ureidoalkylation of ureas with 4,5-dihydroxyimidazolidin-2-ones

Angelina N. Kravchenko; G. A. Gazieva; A. S. Sigachev; E. Yu. Maksareva; K. A. Lyssenko; Nina N. Makhova

Two-step α-ureidoalkylation of ureas with various 4,5-dihydroxyimidazolidin-2-ones gave novel 1,3-dialkyl-4,5-bis(3-alkylureido)-, 1,3-dialkyl-4,5-bis[3-(2-pyrimidyl)ureido]-, or 1,3-dialkyl-4,5-bis(3,3-dialkylureido)imidazolidin-2-ones and ensembles of three imidazolidine rings. The structure of 4,5-bis(2-oxoimidazolidin-1-yl)imidazolidin-2-one was confirmed by X-ray diffraction data.

Russian Chemical Bulletin | 2005

Synthesis of new chiral mono-, di-, tri-, and tetraalkylglycolurils

Angelina N. Kravchenko; A. S. Sigachev; E. Yu. Maksareva; G. A. Gazieva; N. S. Trunova; Boris V. Lozhkin; T. S. Pivina; M. M. Il’in; Konstantin A. Lyssenko; Yu. V. Nelyubina; V. A. Davankov; O. V. Lebedev; Nina N. Makhova; V. A. Tartakovsky

Mendeleev Communications | 2003

A new simple approach to the preparation of imidazo [4,5-e]-1,2,4-triazine derivatives

A. S. Sigachev; Angelina N. Kravchenko; Konstantin A. Lyssenko; Pavel A. Belyakov; O. V. Lebedev; Nina N. Makhova

Mendeleev Communications | 2003

Spontaneous resolution in the imidazolidin-2-one series

Angelina N. Kravchenko; Gul’nara K. Kadorkina; A. S. Sigachev; Elena Yu. Maksareva; Konstantin A. Lyssenko; Pavel A. Belyakov; O. V. Lebedev; Oleg N. Kharybin; Nina N. Makhova; Remir G. Kostyanovsky

Journal of Heterocyclic Chemistry | 2006

Synthesis of first representatives of 3,3′-bi(6,8-dialkyl-2,4-dioxa-6,8-diazabicyclo[3.3.0]octan-7-ones)

A. S. Sigachev; Angelina N. Kravchenko; G. A. Gazieva; Pavel A. Belyakov; N. G. Kolotyrkina; O. V. Lebedev; Nina N. Makhova; Konstantin A. Lyssenko

Chemistry of Heterocyclic Compounds | 2006

Reaction of N-alkylglycolurils with electrophilic reagents

Angelina N. Kravchenko; A. S. Sigachev; G. A. Gazieva; E. Yu. Maksareva; N. S. Trunova; K. A. Chegaev; K. A. Lyssenko; D. V. Lyubetsky; Marina I. Struchkova; M. M. Il’in; V. A. Davankov; O. V. Lebedev; Nina N. Makhova; V. A. Tartakovsky

Russian Chemical Bulletin | 2006

α-Ureidoalkylation of thiosemicarbazide and aminoguanidine

A. S. Sigachev; Angelina N. Kravchenko; Pavel A. Belyakov; O. V. Lebedev; Nina N. Makhova

Russian Chemical Bulletin | 2009

α-Thioureidoalkylation of urea heteroanalogs

G. A. Gazieva; Yu. V. Nelyubina; Angelina N. Kravchenko; A. S. Sigachev; I. V. Glukhov; Marina I. Struchkova; Konstantin A. Lyssenko; Nina N. Makhova

Russian Chemical Bulletin | 2009

4,5-Dihydroxyimidazolidin-2-ones in α-ureidoalkylation of N -carboxy-, N -hydroxy-, and N -aminoalkylureas 2. α-Ureidoalkylation of N -(hydroxyalkyl)ureas

Angelina N. Kravchenko; A. S. Sigachev; Pavel A. Belyakov; M. M. Ilyin; Konstantin A. Lyssenko; V. A. Davankov; O. V. Lebedev; Nina N. Makhova; V. A. Tartakovsky

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