Substituted phosphorylamidophosphates

Conclusions 0,0-Diarylchloro(dichlorophosphorylimido)phosphates were obtained by the reaction of diarylamidophosphates with PC1₅, and were converted into diaroxyphosphorylamidophosphates by hydrolysis.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 11, pp. 2547–2550, November, 1987.     

Substituted pyridines

2, 5-Dimethylpiperidol-4, 1, 2, 5-trimethylpiperidol-4, and the gamma isomer of 1, 2, 5-trimethyl-4-phenylpiperidol-4 are dehydrated by various methods. The secondary piperidols mentioned are used to synthesize 5-methyl-2-formylpyridine and 5-methyl-4-phenyl-2-formylpyridine.     

Substituted pyridines

2-Benzyl-3,6-dimethyl-4-phenylpyridine has been obtained from 2,5-dimethyl-4-phenyl-pyridine by the Ladenburg—Chichibabin reaction. The compounds formed in its oxidation have been studied.Translated from Khimiya Geterotsiklicheskikh Soedinii, Vol. 6, No. 6, pp. 779–781, June, 1970.     

Substituted pyridines

5-Methyl-4-phenyl-2-bromomethylpyridine, obtained from 2,5-dimethyl-4-phenylpyridine via the Wohl-Ziegler reaction, was used in the syntheses of substituted 2-aminomethyl-, 2-ethoxymethyl-, and 2-phenoxymethylpyridines.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 9, pp. 1211–1212, September, 1971.     

Substituted triazolylthioureas

Some substituted triazolylthioureas have been prepared by the reaction of esters of thiocyanic acid with aminotriazoles.     

Substituted pyridines

A number of amides and hydrazides of 4-phenyl-2,5-pyridine dicarboxylic acids are synthesized.     

Substituted pyridines

New 4-n-alkyl-1,2,5-trimethylpiperid-4-ols with pentyl, hexyl, heptyl, nonyl, and decyl radicals in the -position of the piperidine ring have been obtained. Similarly-substituted piperidines have been synthesized from them.     

Substituted polyacetylenes

This article reviews the chemistry of substituted polyacetylenes developed by our research group, more specifically, development of polymerization catalyst, synthesis of new polymers, elucidation of their structure, investigation of their properties, and development of their functions. The main features are as follows: a number of catalysts based on group 5, 6, and 9 transition metals (Nb, Ta, Mo, W, and Rh) have been developed, which include living polymerization catalysts. By using these catalysts, many new substituted polyacetylenes have been synthesized, whose molecular weights are very high (M_w = 10⁴?10⁶). Most of the polymers are soluble in many common solvents and stable enough in the air unlike polyacetylene. Some of these polymers exhibit interesting functions including high gas permeability and photoelectronic properties. © 2006 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 45: 165–180, 2007     

Substituted hydroxycarbohydrazides

Tolylhydrazides of α-thienylglyoxylic acid are reacted with Grignard reagents, to give a series of hitherto undescribed tolylhydrazides of α-aryl-α-(2-thienyl)- and α-butyl-α-(2-thienyl)glycolic acid and their benzoyl derivatives. UV spectra data of the tolylhydrazides given are synthesized. A study is made of the IR spectra of a number of arylhydrazides of α-phenyl-α-(2-thienyl)glycolic acid. For part XXXIV see [1].     

Substituted pyridines

1,2,5-Trimethyl-4-triphenylsilyl-4-piperidol was obtained and converted to 2,5-dimethyl-4-triphenylsilylpyridine. Several transformations of the isomeric piperidols isolated and of the substituted pyridines were examined.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 12, pp. 1637–1641, December, 1970.     

Substituted pyridines

5-Methyl-4-phenyl-2-styryipyridine has been oxidized to 5-methyl-4-phenylpyridinie-2-carboxylic acid. The decarboxylation of this acid has given 3-methyl-4-phenylpyrldine. To prove the structure of -(5-methyl-4-phenyl-2-pyridyl)acetophenone, it has been converted into 2, 5-dimethyl-4-phenylpyridine. The reaction of benzyl chloride with the lithium derivative of 2, 5-dimethyl-4-phenylpyridine has been studied. 3,7-Dimethyl-2-azafluorene has been obtained from 2,5-dimethyl-4-p-tolylpyridine.     

Substituted pyridines

New 4-n-alkyl-1,2,5-trimethylpiperid-4-ols with pentyl, hexyl, heptyl, nonyl, and decyl radicals in the γ-position of the piperidine ring have been obtained. Similarly-substituted piperidines have been synthesized from them.     

Mixed Substituted Ferrocenylenebisphosphanes

Abstract

In our contribution we explored the design of a new type of ferrocenylenebisphosphane ligands with asymmetrically substituted phosphorus atoms (A), which may be interesting regarding stereo control in catalytic enantioselective reactions. Starting from 1, 1′-bis- dichlorophospanoferrocene of which the so far unknown crystal structure could be determined (see below) a variety of ligands with asymmetrical substitution pattern can be synthesized [1]. While in the case of achiral substituents two diastereomers are obtained, in the case of one chiral substituent three diastereomers are observed. As previously reported [2] the diastereomers can be interconverted thermally by inversion of the phosphano groups at elevated temperature without solvent (>20O0 C).     

Substituted Cyclopentannulated Tetraazapentacenes

Brominated pentannulated dihydrotetraazapentacenes were prepared by gold- or palladium-catalyzed 5-endo-dig cyclization of TIPS-ethynylated dihydrotetraazaacenes (TIPS = triisopropylsilyl). Post-functionalization was demonstrated by Sonogashira alkynylation and Rosenmund-von Braun cyanation. Calculations predict these species to act as n-type semiconductors, which was verified for two derivates through characterization in organic field-effect transistors.     

Peripherally Substituted Phthalocyanines

Peripherally substituted phthalocyanine (Pc) systems render more accessible the desirable properties of the Pc system, i.e., high thermal and oxidative stability as well as significant complexity ability of transition metals. After brief examination of existing synthetic methods, two new routes to substitution of the peripheral protons of the Pc system are described: (1) directed metalation of the Pc system itself followed by derivatization, and (2) directed metalation of phthalonitrile followed by derivatization and Pc formation. Each of these methods is further distinguished by providing exclusively substitution at the a-positions of the Pc nucleus. Several of the compounds have been isolated and characterized using the techniques of HPLC; ¹H, ¹³C, and ²⁹Si NMR; and mass spectroscopy. These multisubstituted Pc systems are much more soluble in organic solvents than is the parent system. Such soluble macromolecules are of interest to the energy research community because of a variety of possible applications, notably the preparation of sensors, electrode coatings, catalysts, and soluble oxygen transports.