- TRIAZINE COMPOUNDS AND THEIR USE
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A compound of formula (I) wherein R1 is hydrogen, alkyl, -alkyl-aryl, -alkyl-heterocycloalkyl or -alkyl-0-heterocycloalkyl; R2 is hydrogen, hydroxy, amino, nitro, alkoxy, alkyl, aryl or heteroaryl; R3 is hydrogen, alkyl or
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- Synthesis of 3-Substituted Pentane-2,4-diones: Valuable Intermediates for Liquid Crystals
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General procedures for the synthesis of six series of 3-substituted pentane-2,4-diones are described.The diones were used as intermediates in the preparation of pyrazoles, isoxazoles, and coordination complexes whose mesogenic properties have been studied.Nematic and smectic phases have been obtained in a number of cases, and relationship between molecular structure and mesogenic properties has been explored.
- Cativiela, Carlos,Serrano, Jose L.,Zurbano, Maria M.
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p. 3074 - 3083
(2007/10/02)
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- Simple Synthesis of 4-(Heteroarylmethyl)phenols and Their Acylation
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Condensation of 4-hydroxybenzaldehyde (1) with ethyl acetoacetate (2a) or acetylacetone (2b) gives 3a and 3b, respectively, which on hydrogenation afford the 2-(4-hydroxybenzyl)-1,3-dicarbonyl compounds 4a and 4b, respectively.These react with hydrazines
- Kuebel, Boerries
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p. 1392 - 1401
(2007/10/02)
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- Immonium salts and derivatives thereof
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There are provided: novel aryloxy immonium salts, prepared by the reaction of their corresponding haloformates with amides; and phenolic compositions corresponding to the aryloxy immonium salts. These novel aryloxy immonium salts and their corresponding phenolic compositions have utility as chemical intermediates, antioxidants, stabilizers and antibacterials.
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- Immonium salts and derivatives thereof
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There are provided: novel aryloxy immonium salts, prepared by the reaction of their corresponding haloformates with amides; and phenolic compositions corresponding to the aryloxy immonium salts. These novel aryloxy immonium salts and their corresponding phenolic compositions have utility as chemical intermediates, antioxidants, stabilizers and antibacterials.
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