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Department of Chemistry, Science College, Patna Manuscript received 27 May 1980, revised 8 January 1981, accepted 9 June 1981 Synthesis of 1,2,3,4-tetrahydro derivatives of Reed's base and its complete degradation to 2-amioo-1-naphthoic acid are described. Similarly synthesis of 1,2,3,4-tetrahydro-2,4-dimethyl-6,7-benzoquinoline (Combes' base) and its complete degradation to 2-amino-3-naphthoic acid is also described. This constitutes an evidence that Reed's base is angular while Combes' base Is linear.

Department of Chemistry, Guru Nanak Dev University, Amritsar. Manuscript received 13 November 1975: accepted 3 March 1976 Chelates of U(IV) and Th(IV) of the type, U(OAc)2,L2U(OAc)3L', Th(OAc), L2 and Th(OAc)2L'2(LH=1-OH-2-naphthoic acid and L'H=3-OH-2-naphthoic acid) have been synthe­sised from uranium and thorium tetraacetates in ethanol. Magnetic susceptibility, IR and electronic spectral data of U(IV) chelates and IR of Th(IV) chelates have been reported.

The colourless complex formed by 2-hydroxy 3-naphthoic acid with aluminium has been studied in aqueous solutions of different ionic strengths and at different temperatures spectrophotometrically. The molecular composition has been determined by Job's method of continued variation and is found to be AIR (R=Reagent).The values of \(\bigtriangleup\)H and \(\bigtriangleup\)S are found to be—(9.45±0.15) k. cal/moleand .(52.2±1.5)e.u. respectively.The probable structure of the complex is also suggested.

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Substituted 12-Aminobenz/b/Acridines.

Department of Chemistry, Sardar Patel University, Vallabh Vidyanagar, Gujarat Manuscript received 9 June 1971; accepted for publication 14 January 1972 The condensations of 3-amino-2-naphthoic acid with various acid amides and of various 3-N-acylamino -2-naphthoic acids with formarnide leading to the formation of 2-H, Me, CH2Ph, Ph, p-NO2ph and p-OMePh-3H-benll:o (6,7)-4-oxoquinall:olines have been studied systematically. Additional evidence in favour of the reaction mechanism proposed for Nietn.entowski-4-oxoquinazoline synthesis has been provided.1 UV spectra of these compounds have been studied in aqueous ethanol at different pHs. The spectra of these compounds in neutral medium are compared with those of their 3-Me and 3-Ph-substituted derivatives. 2-p-Nitroplaenyl and 2-p-anisyl derivatives of 3-Me and 3-Ph-benll:o (617)-4-oxoquinazolines have been synthesised starting with the corresponding 2-arylbenzo (6,7)-4H-3, 1-benzoxazin-4-one.

Chemistry Department, Gujarat University, Ahmedabad-9 Received 4 November 1968; revised MSS received 9 September 1971 Several 2-alkyl-3-alkyl/aralkyl/aryl and 2-mercapto-3-aralkyl/alkyl/aryl-4(3H)benzo(g)quinazolinones have beensynthesized for studying their physiological properties. TheseCompounds have been prepared from 2-amino-3-naphthoic acid and the appropriateamine of isothiocyanates. Some of these have been characterised through their S-methylderivatives.

The orange-coloured, water-solublecomplex, formed by the interaction of uranyl ion and 2-hydroxy­-3-nahthoie sold, has been studied speetrophotometrically in aqueous solutions of different ionic strengths and at different temperatures. It has an absorption maximum at 450 mp. and a flat region thereafter. The optimum pH range le 4.5 to 4.8 and it is stable towards time. The formula of the complex, established spectre­photemetrioally and conductometrically, is UO2R (R= reagent). The molecular extinction coefficient Is 4.18X 10'. The dissociation Constant of the oomph's has been determined for different ionic strengths and temperatures. The values of All and As are found to be —5.104 kcal. and 37.2±0.2 e.e. respectively. The probable structure of the complex is also suggeted.

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The orange-coloured, water-soluble complex, formed by the interaction of uranyl ion and 2-hydroxy­-3-nahthoie sold, has been studied speetrophotometrically in aqueous solutions of different ionic strengths and at different temperatures. It has an absorption maximum at 450 mp. and a flat region thereafter. The optimum pH range le 4.5 to 4.8 and it is stable towards time. The formula of the complex, established spectre­photemetrioally and conductometrically, is UO2R (R= reagent). The molecular extinction coefficient Is 4.18X 10'. The dissociation Constant of the oomph's has been determined for different ionic strengths and temperatures. The values of All and As are found to be —5.104 kcal. and 37.2±0.2 e.e. respectively. The probable structure of the complex is also suggeted.