

2021 № 6 (648) p. 611–708
Table of Contents
Anniversaries and dates
IN MEMORY OF PROFESSOR ROLF HUISGEN (1920-2020) |
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611-612 |
PROFESSOR, DOCTOR OF SCIENCES IN CHEMISTRY ALEXANDER VIKTOROVICH AKSENOV TO THE 55TH BIRTHDAY |
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613-614 |
Review Articles
METHODS FOR THE PREPARATION OF 3-NITROBENZOFURANS |
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Виталий А. Осянин, Дмитрий В. Осипов, Дарья А. Ращепкина, Юрий Н. Климочкин | 615-623 |

Heterocycles in Focus
FORMATION OF FIVE- AND SIX-MEMBERED NITROGEN-CONTAINING HETEROCYCLES ON THE BASIS OF HYDRAZONES DERIVED FROM α-DICARBONYL COMPOUNDS |
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Василий В. Пелипко, Кирилл А. Гомонов | 624-626 |

SYNTHESIS OF ISOXAZOLO[5,4-b]PYRIDINE DERIVATIVES |
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Людмила В. Дядюченко, Виктор В. Доценко | 627-629 |

RING-CLOSURE REACTIONS OF FUNCTIONALIZED VINYL SULFONAMIDES |
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Alexey V. Dobrydnev, Taras V. Omelian | 630-632 |

Original Papers
PALLADIUM-CATALYZED AMINO GROUP ARYLATION OF 1,3-DISUBSTITUTED 1H-PYRAZOL-5-AMINE BASED ON BUCHWALD–HARTWIG REACTION |
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Mateusz Kucharek, Andrzej Danel | 633-639 |

HIGHLY FUNCTIONALIZED PYRAZOLINES FROM SYMMETRIC AND ASYMMETRIC 1,2-DISULFONYLHYDRAZINES: A COMBINATION OF EXPERIMENTAL AND DFT PERSPECTIVES |
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Nasimeh Safari, Gholamhassan Imanzadeh, Roghayyeh Asgharzadeh, Seyyedeh Tahereh Hosseyni, Amir Nasser Shamkhali, Zahra Soltanzadeh | 640-645 |

SYNTHESIS OF 1,3-DIALKYL-4-[(ARYLMETHYLIDENE)AMINO]GLYCOLURILS |
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Сергей А. Серков, Марина А. Еськова, Наталья В. Сигай, Наталия Н. Костикова, Татьяна Н. Вольхина, Наталья Г. Колотыркина, Галина А. Газиева | 646-655 |

SYNTHESIS AND TRANSFORMATIONS OF 4-PHENYLETHYNYLAND 4-STYRYLPYRAZOLO[5,1-c][1,2,4]TRIAZINES |
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Сергей М. Иванов, Денис С. Колтун | 656-665 |

ADDITION REACTION OF VARIOUS AZOLES TO PERFLUOROMETHYL VINYL ETHER |
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Kirill I. Petko, Andrey A. Filatov | 666-671 |

ELECTROCATALYTIC CASCADE APPROACH TO THE SYNTHESIS OF DIHYDRO-2'H,3H-SPIRO[1-BENZOFURAN-2,5'-PYRIMIDINES] |
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Fedor V. Ryzhkov, Michail N. Elinson, Yuliya E. Ryzhkova, Anatoly N. Vereshchagin, Artem N. Fakhrutdinov, Mikhail P. Egorov | 672-678 |

TWO APPROACHES TO REGIO- AND STEREOSELECTIVE SYNTHESIS OF N-UNSUBSTITUTED 3-ARYL-4-(TRIFLUOROMETHYL)-4H-SPIRO[CHROMENO[3,4-c]PYRROLIDINE-1,3'-OXINDOLES] |
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Владислав Ю. Коротаев, Савелий В. Барковский, Игорь Б. Кутяшев, Мария В. Улитко, Алексей Ю. Барков, Николай С. Зимницкий, Иван А. Кочнев, Вячеслав Я. Сосновских | 679-690 |

Short Communications
OXA-[3+3] ANNULATION OF 1H-BENZO[f]CHROMENE-2-CARBALDEHYDES AND 2-NAPHTHOLS: SYNTHESIS OF 7aH,15H-BENZO[f]BENZO[5,6]CHROMENO[2,3-b]CHROMENES |
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Ирина А. Семёнова, Виталий А. Осянин, Дмитрий В. Осипов, Юрий Н. Климочкин | 691-694 |

SYNTHESIS OF SPIRO[IMIDAZOLE-4,3'-QUINOLIN]ONES FROM [2-(DIMETHYLAMINO)BENZYLIDENE]-2-(METHYLSULFANYL)IMIDAZOLONES |
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Эльвира Р. Зайцева, Александр Ю. Смирнов, Надежда С. Балеева, Михаил С. Баранов | 695-699 |

SELECTIVE SYNTHESIS OF A NOVEL GLYCOLURIL-BASED HYBRID COMPOUND WITH HIGH APPLICATION POTENTIAL |
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Елена А. Мамаева, Анастасия В. Леппа, Абдигали А. Бакибаев | 700-703 |

SYNTHESIS VIA THE MANNICH REACTION AND BIOLOGICAL ACTIVITY OF NOVEL FLUORINATED CAMPTOTHECIN DERIVATIVES |
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Chuanhao Wang, Yuan Wang, Haijun Ma, Yazhao Zhu, Yanming Zhang, Zhenyuan Miao, Yuelin Wu | 704-708 |

Latvian Institute of Organic Synthesis - Aizkraukles iela, 21, Riga, LV-1006, Latvia - hgs@osi.lv