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Showing papers on "Derivative (chemistry) published in 1971"







Patent
D Forster1, A Hershman1
27 Dec 1971
TL;DR: In this article, a stabilized catalyst system consisting of a rhodium or iridium compound, a halide promoter and an organic derivative of pentavalent phosphorus, arsenic, antimony, nitrogen or bismuth was used to produce carboxylic acids by carboxylation of unsaturated compounds.
Abstract: Production of carboxylic acids by carboxylation of ethylenically unsaturated compounds utilizing a stabilized catalyst system comprising a rhodium or iridium compound, a halide promoter and as a stabilizer an organic derivative of pentavalent phosphorus, arsenic, antimony, nitrogen or bismuth.

63 citations


Journal ArticleDOI
TL;DR: The preparation of [2]ferrocenophane and its tetramethyl derivative has been effected by direct synthesis from 1,2-dicyclopentadienylalkane dianions and ferrous chloride as discussed by the authors.

48 citations


Patent
T Enomoto1, T Kawanishi1, A Yasumori1, T Shiga1, Y Hirosawa1, T Kubota1 
23 Dec 1971
TL;DR: In this paper, a photo-polymerizable N-vinyl monomer, a photoactive agent and a dye sensitizer are selected from a group consisting of a benzopyrylium salt and a double complex salt.
Abstract: A photosensitive material for producing a photographic recording material, comprising a resinous binder solution containing dispersed therein a photo-polymerizable N-vinyl monomer, a photoactive agent and a dye sensitizer, said dye sensitizer consisting essentially of a salt selected from the group consisting of (1) a benzopyrylium salt and (2) a double complex salt consisting essentially of said benzopyrylium salt and a decolorized derivative of said benzopyrylium salt.

45 citations


Journal ArticleDOI
Geza Hrazdina1
TL;DR: In this paper, a coumarin derivative was characterized by its chromatographic and spectral properties and its aglucone was shown to be identical with 3,5,7-trihydroxy coumarins.

42 citations







Patent
02 Jun 1971
TL;DR: In this paper, a diagram of 3''-4''-DIDEOXYKANAMYCIN B is presented to protect the amino and all or a part of the HYDROXYL GROUPS other than 3'' and 4''.
Abstract: SYNTHESIS OF 3''-4''-DIDEOXYKANAMYCIN B WHICH COMPRISES PROTECTING THE AMINO AND ALL OR A PART OF THE HYDROXYL GROUPS OTHER THAN 3'' AND 4''-HYDROXYL GROUPS OF KANAMYCIN B, SULFONYLATING 3''- AND 4''-HYDROXYL GROUPS TO GIVE A DERIVATIVE HAVING DISULFONIC ESTER GROUPS, REMOVING SAID ESTER GROUPS TO GIVE 3''-4''-UNSATURATED COMPOUND, REDUCING SAID COMPOUND AND FINALLY REMOVING THE RESIDUAL PROTECTING GROUPS.

Patent
27 Oct 1971
TL;DR: In this article, a pressure sensitive recording paper comprising a layer of microcapsules containing a color former and layer of a color developer, said layers coated on the same support or different supports, and at least one of said layers containing an ether derivative of an aromatic hydroxyl compound.
Abstract: A pressure-sensitive recording paper comprising a layer of microcapsules containing a color former and a layer of a color developer, said layers coated on the same support or different supports, and at least one of said layers containing an ether derivative of an aromatic hydroxyl compound.


Journal ArticleDOI
TL;DR: In this paper, 1.6-anhydro-β-D-mannopyranose was obtained in an overall yield of 3.3% by direct crystallisation.
Abstract: Durch Vakuumpyrolyse von D-Mannose ist neben 1.6-Anhydro-β-D-mannopyranose die 1.6-Anhydro-β-D-mannofuranose (1 a) direkt in 3.3 proz. Ausb. kristallisiert gewinnbar. RuO4-Oxydation der 2.3-Isopropyliden-Verbindung von 1 a ergibt 1.6-Anhydro-2.3-O-isopropyliden-β-D-lyxo-hexofuranos-5-ulose (3), die mit LiAlH4 selektiv zum 1.6-Anhydro-α-L-gulofuranose-Derivat 4 hydriert wird. Preparation of 1.6-Anhydro-β-D-mannofuranose and 1.6-Anhydro-α-L-gulofuranose Vacuum pyrolysis of D-mannose yields 1.6-anhydro-β-D-mannopyranose besides 1.6-anhydro-β-D-mannofuranose (1a), which can be obtained in an overall yield of 3.3% by direct crystallisation. RuO4-Oxidation of the 2.3-O-isopropylidene derivative of 1 a leads to the formation of 1.6-anhydro-2.3-O-isopropylidene-β-D-lyxo-hexofuranos-5-ulose (3), which is reduced with LiAlH4 stereoselectively to the corresponding 1.6-anhydro-α-L-gulofuranose derivative 4.

Journal ArticleDOI
TL;DR: A number of bicyclic organotin compounds have been synthesised by treating the corresponding organic halide with (trialkyl- or triarylstannyl)sodium in liquid ammonia as mentioned in this paper.



Patent
16 Dec 1971
TL;DR: In this article, a process for the preparation of ethylenic carbonyl compounds of general formula (II) by isomerization of an acetylenic alcohol was described.
Abstract: Process for the preparation of ethylenic carbonyl compounds of general formula (II) by isomerization of an acetylenic alcohol of general formula (I) in the presence of a catalyst consisting of a derivative of titanium and a derivative of copper or of silver, and optionally in the presence of an acid, optionally in the form of an ester or anhydride, or of an inorganic ester.


Journal ArticleDOI
TL;DR: In this article, the influence of Substituents on the Oxidation of Quaternary Pyridinium compounds has been investigated and two isomeric pyridones are normally formed Only from the 3-carboxylic acid or 3-nitro derivative results exclusively the corresponding 6pyridone.
Abstract: Bei der Hexacyanoferrat(III)-Oxydation 3-substituierter 1-Methyl-pyridiniumverbindungen entstehen normalerweise zwei isomere Pyridone Lediglich bei dem 3-Carboxy- bzw dem 3-Nitro-Derivat resultiert ausschlieslich das entsprechende Pyridon-(6) Pyridones, III Influence of Substituents on the Oxidation of Quaternary Pyridinium Compounds By hexacyanoferrate(III) oxidation of 3-substituted 1-methylpyridinium compounds two isomeric pyridones are normally formed Only from the 3-carboxylic acid or the 3-nitro derivative results exclusively the corresponding 6-pyridone

Journal ArticleDOI
TL;DR: An ethylene imine temporary crown material was investigated and two advantages were found compared with acrylic resin, but mechanical weaknesses suggest that the material should be of temporary use only.
Abstract: An ethylene imine temporary crown material was investigated. Two advantages were found compared with acrylic resin, but mechanical weaknesses suggest that the material should be of temporary use only.


Journal ArticleDOI
TL;DR: A position-specific method for the introduction of C-6 aldehyde functionality into cellulose at two levels of degree of substitution (d.s.s) was described in this paper.