Chemistry of Heterocyclic Compounds

Công bố khoa học tiêu biểu

* Dữ liệu chỉ mang tính chất tham khảo

Sắp xếp:  
Synthesis of azoxindoles
Chemistry of Heterocyclic Compounds - - 1990
Э. С. Кричевский, В. Г. Граник
Configurations of stereoisomers of 1-(3-phenylprop-2-ynyl)-2-methyldecahydroquinol-4-one and the corresponding acetylenic alcohols
Chemistry of Heterocyclic Compounds - Tập 23 - Trang 205-209 - 1987
S. G. Klepikova, S. A. Tarakov, L. P. Krasnomolova, K. D. Praliev, O. V. Agashkin, D. V. Sokolov
IR and PMR spectroscopy and chemical methods have been used to establish the structures of stereoisomeric 1-(3-phenylprop-2-ynyl)-2-methyldecahydroquinol-4-ones and the corresponding acetylenic alcohols.
Huỳnh quang và photocyclization của các cation pyridinium thay thế N-naphthyl Dịch bởi AI
Chemistry of Heterocyclic Compounds - Tập 20 - Trang 1262-1266 - 1984
Ya. R. Tymyanskii, V. M. Feingel'man, M. I. Knyazhanskii, N. V. Kholodova
Các tính chất quang phổ huỳnh quang và quang hóa của các muối perchlorate 1-naphthyl-2,4-di- và 2,4,6-triphenylpyridinium đã được nghiên cứu trong dung dịch ở nhiệt độ 293 và 77 °K. Sự chuyển dịch Stokes bất thường lớn của huỳnh quang là do sự thay đổi adiabatic trong cấu trúc của các phân tử do sự quay của các nhóm thế C- hoặc N-aryl. Huỳnh quang nhìn thấy được xuất hiện từ sự chuyển giao năng lư...... hiện toàn bộ
#huỳnh quang #cation pyridinium #photocyclization #perchlorate #năng lượng T-T #phân tử.
Synthesis and catalytic oxidation of 2,5-dimethylpyrazine
Chemistry of Heterocyclic Compounds - Tập 22 - Trang 915-917 - 1986
V. V. Kastron, I. G. Iovel', I. P. Skrastyn'sh, Yu. Sh. Gol'dberg, M. V. Shimanskaya, G. Ya. Dubur
The classical method for obtaining 2,5-dimethylpyrazine by cyclization of amino-acetone has been improved by use of ammonium persulfate in place of mercuric chloride in the stage of catalytic oxidation of 2,5-dimethyldihydropyrazine. Catalytic vapor phase oxidation of 2,5-dimethylpyrazine gave 5-methylpyrazine-2-aldehyde and pyrazine-2,5-dialdehyde.
Synthesis and1H,13C, and29Si spectroscopic investigation of 2-thienyl(2′-Furyl)- and 2′-thienyl[2′-(4′,5′-dihydrofuryl)]silanes
Chemistry of Heterocyclic Compounds - Tập 31 - Trang 1065-1070 - 1995
É. Lukevits, L. M. Ignatovich, N. V. Shilina, Yu. Popelis, I. Birgele
The complete series of 2-thienyl(2′-furyl)- and 2-thienyl[2′-(4′,5′-dihydrofuryl)]silanes have been synthesized, and the influence of the character and number of substituents on the chemical shifts in the1H,13C, and29Si spectra has been investigated.
Synthesis of 2-methyl-3-carbethoxypyrylium salts by the condensation of ethoxymethyleneacetoacetic ester with ketones
Chemistry of Heterocyclic Compounds - - 1971
G. N. Dorofeenko, E. P. Olekhnovich, L. I. Laukhina
A method is proposed for the synthesis of 2-methyl-3-carbethoxypyrylium salts by the acid condensation of ethoxymethyleneacetoacetic ester with alkyl aryl, heterocyclic, and cyclic ketones or resorcinol. 2-Methyl-3-carbethoxy-6-phenylpyrylium perchlorate was condensed with benzaldehyde, and the product was subjected to acid hydrolysis and decarboxylation to 2-methyl-6-phenylpyrylium perchlorate to...... hiện toàn bộ
Reactions of 2-Mono- and 2,6-Disubstituted 4-Pyrones with Phenylhydrazine as General Method for the Synthesis of 3-(N-Phenylpyrazolyl)Indoles
Chemistry of Heterocyclic Compounds - Tập 50 - Trang 1388-1403 - 2014
D. L. Obydennov, B. I. Usachev, V. Ya. Sosnovskikh
Phenylhydrazine reacted regioselectively with 6-substituted 4-pyrone-2-carboxylic acids (or esters) in protic and aprotic solvents, leading to phenylhydrazones of 3-(3-R-1-phenylpyrazol-5-yl)- or 3-(5-R-1-phenylpyrazol-3-yl)pyruvic acids (or esters), respectively. 6-Di(tri)fluoromethylcomanic acids (or esters) reacted analogously, forming the corresponding phenylhydrazones with RF group in the sid...... hiện toàn bộ
Atranes. IV. 1-Alkoxysilatranes
Chemistry of Heterocyclic Compounds - Tập 1 - Trang 137-140 - 1965
M. G. Voronkov, G. I. Zelchan
A new method of synthesizing 1-alkoxysilatranes is described. It is based on transesterification of lower tetraalkoxysilanes with an equimolar mixture of triethanolamine and appropriate alcohol. The method is used to prepare 15 compounds of this type in 50–90% yields. Of these only one, R = = C2H5, was previously known. Th...... hiện toàn bộ
1-Amino-3-alkyl-2-(methylthio)benzimidazolium salts: synthesis, reaction with CH-acid anions, and conversion to pyrazolo[1,5-a]benzimidazole derivatives
Chemistry of Heterocyclic Compounds - - 1992
T. A. Kuz'menko, V. V. Kuz'menko, A. F. Pozharskii, O. V. Kryshtalyuk, G. G. Aleksandrov
For the first time, 1-amino-3-alkylbenzimidazolinethiones were obtained by heating 1-amino-3-alkylbenzimidazolium iodides with sulfur in the presence of triethylamine. They were converted to 1-amino-3-alkyl-2-(methylthio)benzimidazolium salts, which, during reaction with CH-acid onions, gave the corresponding 1-amino-3-alkyl-2-methylenebenzimidazoline derivatives. Under conditions of alkaline or a...... hiện toàn bộ
Reactions of 1-vinylbenzimidazole-2-thione with alcohols and phenol
Chemistry of Heterocyclic Compounds - Tập 20 - Trang 656-658 - 1984
N. D. Abramova, G. G. Skvortsova, B. V. Trzhtsinskaya
1-(α-Alkoxyethyl)- and 1-(α-phenoxyethyl)benzimidazole-2-thiones were obtained in the reaction of 1-vinylbenzimidazole-2-thione with alcohols and phenol in the presence of gaseous hydrogen chloride. It was established that partial hydrolysis of the 1-(α-alkoxyethyl)benzimidazole-2-thiones to benzimidazole-2-thione with subsequent alkylation with excess alcohol at the exocyclic sulfur atom occurs u...... hiện toàn bộ
Tổng số: 11,220   
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 10