VOLUME 1, NO2, DEC 1979

Formose-Reaktion, IV Strukturaufldarung einiger Zwischen - und Endprodukte Formose Reaction, IV Structure Determination of Some Intermediate and End products

The molecular structures of some intermediate and end products of the fc.rmose reac­tion are determined by means of coupled gas chromatography/mass spectrometry and by PFT 13C NMR spectroscopy. It is shown that glycolaldehyde, glyceraldehyde and dihydroxiacdone, which are intermediate products, are not single compounds but mixtures of monomers: hydroxicarbonyl com­pounds, epoxides, hydrates and dimers: half acetalrand full acetals. The structure of KUSIN's prod\lct, which is a key substance in LANGENBECK's theory ofautocatalysis is confirmed to be hydroximethyl­benzoine. Only a minor tendency of a fission into benzoine and "active formaldehyde" but decompo­sition of the catalyst by fission into benzoic acid is observed. The structure of UTKIN's product is confirmed to be a branched chain ketohexose caII~d dendroketose. Using heterogenous call;ium­hydroxide as a catalyst UTKIN's yields of dendroketose are doubled.read more

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G HARSCH ,

Complexation of Bi(III) with Chloride ion in non-aqueous medium

The complexation of Bi{III) with chloride ion has been studied in non-aqueous medium. The state and behaviour of BielS and its higher complexes have been examined in organic solvents. This attempt is merely an addition to the study of Bi{III) complexes with potassium diphenyldiseleno­phosphate where Bi{I1I) forms complexes of definate (l:S) composition.read more

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A RAFEE ,N T YATSIMIRSKAYA ,

Lectam Acetals 4: Reactions with Araldehyes

Lactarn acetals undergo facile e1ectrophilicsubstitution at II positioH with araldehydes to fonn benzhydrols. Both threo and erythro products are formed, their proportion depending upon the aldehyde; the products unfacile dehydration to form (E)-ll-benzylidene derivatives. Ibc threo oamino benzhydrols obtained as the exclusive products by reaction of lactarn acetals with amin aldehyde undergo instantaneous cyclisation to give a novel one pot synthesis of l-substi­tuted azacycloalkano (2, 3-b )quinolines.read more

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P C JAIN ,J SINGH ,V VIRMANI ,N ANAND ,

Decay of Biphenyr1 and Pyrene-1 in Liquid Methylamine at 298K

ApuIse-radiolytic study shows that the anion of biphenyl decayed in liquid methyla~ mine via a first order process. The absorptions at 410 and 640 nm both decyed With the same rate ­constant. k is (2.4 :t 0.3) x 105 i1 in the concentration range 1.16 x 10- •.. 5 x 10-2 mol dm-3 of biphenyl. \iowever, in a 5 x 10-4 mol dm-3 solution of biphenyl 1 k is (1.1 :t 0.06) x 105 i1• The anion of pyrene showed an absorption spectrum With a maximum at 490 nm. It decayed by a second order process haviJ}g 2k:: (3.5 :t 0.4) x 105 e490 dm3 mor1 i1• When a solution ofpyrene contain­ing 10-3 mol dm-3 methylamine hydrochloride was irradiated, the order of the decay remained un­changed, but 2k was reduced to (1.3 :t 0.2) x 105 e490 dm3 mol:1 i1•read more

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M A SAMI ,

CHEMISORPTION OF GLYCINATE ON CUPROUS OXIDE DETERMINED BY INFRARED INTERNAL REFLECTION SPECTROMETRY

Thin film of copper metal was vacuum deposited on KRS-5 internal reflection prism.Infrared Internal Reflection Spectrometry was employed to observe the chemical reaction taking place at the resulting metal surface with IO-6M glycine solutio~ of 8.2 pH. The investig-dtion shows that the formation of Cu(l) glycinate chelate was formed at the surface of a film of cuprous oxide.read more

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J S MATTSON ,I A KHAN ,

Reductive Cyclization of Indolic Imides A New  -Carboline Synthesis

A new· method is described for the synthesis of b-carbolines from indolic imides by reaction of the intermediate vilsmeier complexes with zinc. read more

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A U RAHMAN ,N WAHEED ,

Synthesis of 6,9-Diazadibenzo [c,g]phenanthrene and 7 ,13-Diazadibenzo [c)i] phenanthrene through Double Benzyne Cyclisation1

Synthesis of 6,9-Diazadibenzo [c,g]phenanthrene and 7 ,13-Diazadibenzo [c)i] phenanthrene through Double Benzyne Cyclisation1read more

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P S PAHWA ,Y P GUPTA ,V JAIN ,P SINGH ,S V KESSAR ,

Photochemical Synthesis of 4 (beta)-19-Methyl-Imino-5-(alpha)-Cholestane

Photochemical transformation are outlined with novel stereochemical or other mecha­nistic features leading to the synthesis of 4b-19-methyl-imino-50a-cholestane.read more

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A M FARID ,J McKENNA ,J M McKENNA ,

Synthesis of N-(methyl-6-deoxy-(beta)-D-glucopyranos-6-ide) saccharin

Synthesis of N-(methyl-6-deoxy-(beta)-D-glucopyranos-6-ide) saccharinread more

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C K LEE ,

Studies on the structure of Juliflorine

A partial. structure for juliflorine, an alkaloid from Prosopis juliflora, DC has been proposed.read more

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V U AHMAD ,Z G MOHAMMAD ,