65997-87-7Relevant articles and documents
COMPLEXES OF CYCLOMALTOHEPTAOSE WITH AROMATIC DIAZO COMPOUNDS: FORMATION AND REACTIONS
Abelt, Christopher J.,Lokey, Jonathan S.,Smith, Shelley H.
, p. 119 - 130 (2007/10/02)
Pyrolysis of the relatively stable, solid complexes of cyclomaltoheptaose (β-cyclodextrin) with phenyldiazomethane, 1-diazo-1-phenylethane, and diazo(diphenyl)methane results in degradation of the labile guests.The host matrix exerts "reaction-vessel" and "shape-selectivity" effects upon the reaction pathways of the guests and derivatives.The carbene insertion reaction with the β-cyclodextrin hydroxyl groups is regioselective.
Thiolato dinitrogen (or hydrazido(4-)) complexes, [Ta(SAr)3(THF)]2(μ-N2) (Ar = 2,6-C6H3-i-Pr2, 2,4,6-C6H2-i-Pr3), and phenoxide analogues. Structural comparison of [Ta(S-2,6-C6H3-i-Pr2)3(THF)] 2 ...
Schrock,Wesolek,Liu,Wallace,Dewan
, p. 2050 - 2054 (2008/10/08)
Full title: Thiolato dinitrogen (or hydrazido(4-)) complexes, [Ta(SAr)3(THF)]2(μ-N2) (Ar = 2,6-C6H3-i-Pr2, 2,4,6-C6H2-i-Pr3), and phenoxide analogues. Structural comparison of [Ta(S-2,6-C6H3-i-Pr2)3(THF)] 2(μ-N2) and [Ta(O-2,6-C6H3-i-Pr2)3(THF)] 2(μ-N2). [TaCl3(THF)2]2(μ-N2) reacts with 6 equiv of LiDIPP (DIPP = O-2,6-C6H3-i-Pr2) to give [Ta(DIPP)3(THF)]2(μ-N2) (1) in 60% isolated yield. Crystals of [Ta(DIPP)3(THF)]2(μ-N2) belong to the space group C2/c with a = 20.276 (8) A?, b = 16.737 (7) A?, c = 28.227 (19) A?, β = 105.55 (5)°, V = 9228 A?3, and Z = 4. The structure contains a hydrazido(4-) μ-N2 ligand with N-N = 1.32 (1) A?, Ta-N = 1.796 (5) A?, and Ta-N-N = 176.6 (6)°. The μ-N2 ligand is bound to the metal in an equatorial position of a trigonal bipyramid. [Ta(TIPT)3(THF)]2(μ-N2) (3; TIPT = S-2,4,6-C6H2-i-Pr3) and [Ta(DIPT)3(THF)]2(μ-N2) (4; DIPT = S-2,6-C6H3-i-Pr2) can be prepared analogously in high yield. Crystals of [Ta(DIPT)3(THF)]2(μ-N2) (4) belong to the space group Pc21n with a = 13.606 (6) A?, b = 23.096 (9) A?, c = 28.845 (10) A?, V= 9064.5 A?3, and Z = 4. In this relatively poor quality structure N-N = 1.29 (6) A?, Ta-N = 1.90 (6) and 1.72 (6) A?, and Ta-N-N = 166 (5)°. In this case the μ-N2 ligand is bound in an axial position trans to THF in a trigonal-bipyramidal ligand arrangement about each metal. Neither 1 nor 3 can be prepared by treating Ta(CHCMe3)(DIPP)3(THF) or Ta(CHCMe3)(TIPT)3(THF) with benzaldehyde azine. 1 reacts readily with benzaldehyde to give benzaldehyde azine in high yield, while 3 gives only ～25% benzaldehyde azine.
Base-catalysed Condensation of Aromatic Aldehydes with 4,5-Dihydro-6-methylpyridazin-3(2H)-one
Ismail, M. F.,El Khamry, A. A.,Shams, N. A.,El Sawy, O. M.
, p. 203 - 205 (2007/10/02)
4-Arylmethyl-6-methylpyridazin-3(2H)-ones (IIIa-d) have been prepared by the condensation of aromatic aldehydes with 4,5-dihydro-6-methylpyridazin-3(2H)-one (I) in basic media.Compounds IIIa-d react in the lactim form with POCl3 to give 4-arylmethyl-3-chloro-6-methylpyridazines (Va-d), while these react in the lactam form with dimethyl sulphate to give 4-arylmethyl-2,6-dimethylpyridazin-3(2H)-ones (VIa-d).Compound IIId reacts with ethyl bromoacetate in the presence of sodium ethoxide to give the ethyl ester (VIIa) which reacts with benzylamine and hydrazine hydrate togive the corresponding N-benzylamide (VIIc) and hydrazide (VIId).The ester (VIIa) is readily hydrolysed to the corresponding acid (VIIb).
