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Displaying article 1-65
M232
Received: 21 February 2001 / Accepted: 15 May 2001 / Published: 25 May 2001
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M233
Received: 22 February 2001 / Accepted: 15 May 2001 / Published: 25 May 2001
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M234
Received: 22 February 2001 / Accepted: 15 May 2001 / Published: 25 May 2001
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M235
Received: 22 February 2001 / Accepted: 15 May 2001 / Published: 25 May 2001
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M236
Received: 16 January 2001 / Accepted: 15 May 2001 / Published: 25 May 2001
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M237
Received: 17 December 2000 / Accepted: 15 December 2001 / Published: 20 December 2001
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M238
Received: 17 December 2000 / Accepted: 15 May 2001 / Published: 25 May 2001
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M239
Received: 10 January 2001 / Accepted: 15 May 2001 / Published: 25 May 2001
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M240
Received: 10 January 2001 / Accepted: 15 May 2001 / Published: 25 May 2001
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M241
Received: 8 June 2001 / Accepted: 14 December 2001 / Published: 20 December 2001
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M242
Received: 8 June 2001 / Accepted: 14 December 2001 / Published: 20 December 2001
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M243
Received: 28 May 2001 / Accepted: 14 December 2001 / Published: 20 December 2001
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M244
Received: 28 May 2001 / Accepted: 14 December 2001 / Published: 20 December 2001
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M246
Received: 28 May 2001 / Accepted: 14 December 2001 / Published: 20 December 2001
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M247
Received: 28 May 2001 / Accepted: 14 December 2001 / Published: 20 December 2001
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M248
Received: 12 May 2001 / Accepted: 15 May 2001 / Published: 25 May 2001
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M249
Received: 28 May 2001 / Accepted: 14 December 2001 / Published: 20 December 2001
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M250
Received: 28 May 2001 / Accepted: 14 December 2001 / Published: 20 December 2001
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M251
Received: 28 May 2001 / Accepted: 14 December 2001 / Published: 20 December 2001
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M252
Received: 28 May 2001 / Accepted: 14 December 2001 / Published: 20 December 2001
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M260
Received: 28 May 2001 / Accepted: 15 December 2001 / Published: 20 December 2001
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M261
Received: 5 June 2001 / Accepted: 15 December 2001 / Published: 20 December 2001
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M262
Received: 5 June 2001 / Accepted: 15 December 2001 / Published: 20 December 2001
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M263
Received: 5 June 2001 / Accepted: 15 December 2001 / Published: 20 December 2001
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M264
Received: 8 June 2001 / Accepted: 15 December 2001 / Published: 20 December 2001
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M265
Received: 8 June 2001 / Accepted: 15 December 2001 / Published: 20 December 2001
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M266
Received: 8 June 2001 / Accepted: 15 December 2001 / Published: 20 December 2001
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M267
Received: 14 June 2001 / Accepted: 15 December 2001 / Published: 20 December 2001
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M268
Received: 14 June 2001 / Accepted: 15 December 2001 / Published: 20 December 2001
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M269
Received: 27 October 2001 / Accepted: 15 December 2001 / Published: 20 December 2001
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M270
Received: 27 October 2001 / Accepted: 15 December 2001 / Published: 20 December 2001
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M271
Received: 18 June 2001 / Accepted: 15 December 2001 / Published: 20 December 2001
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M272
Received: 18 June 2001 / Accepted: 15 December 2001 / Published: 20 December 2001
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M273
Received: 20 November 2001 / Accepted: 15 December 2001 / Published: 20 December 2001
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M274
Short Note:
(4aS,6R,8aS)-4a,5,9,10,11,12-Hexahydro-6H-benzofuro[3a,3,2-ef][2]benzazepine-3,6-diol (Norsanguinine)
Received: 1 December 2001 / Accepted: 15 December 2001 / Published: 20 December 2001
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M275
Received: 1 December 2001 / Accepted: 15 December 2001 / Published: 20 December 2001
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p. 927-958
Received: 1 October 2001 / Accepted: 24 October 2001 / Published: 30 November 2001
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| Download PDF Full-text (223 KB) Abstract: This review reports some novel (or improved) synthetic methods for preparing a number of aromatic (carbocyclic and predominantly heterocyclic) organomercurials, particularly those derived from theophylline, theobromine and uracil , as well as some novel halo- and cyano-demercuration reactions. We have also synthesized the first stable organic derivative of mercury(I), viz. 1,8-bis(acetoxydimercurio) theobromine , and studied its novel reactions. We have also improved the old Willgerodt method (1897), applicable for preparing various diaryliodonium chlorides from appropriate (dichloroiodo)arenes and symmetric aromatic mercurials . A full list of our works, published over the past twenty years (1980-2000), is also provided (see Refs. 1-16).
p. 959-963
Received: 22 October 2001; in revised form: 30 October 2001 / Accepted: 30 October 2001 / Published: 30 November 2001
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| Download PDF Full-text (27 KB) Abstract: An improved procedure for the synthesis an analog of the p38 inhibitor compound VX- 745 is reported.
p. 964-968
Received: 9 January 2001; in revised form: 31 October 2001 / Accepted: 31 October 2001 / Published: 30 November 2001
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| Download PDF Full-text (61 KB) Abstract: The reaction of substituted and unsubstituted propargylic bromides with butanal in presence of zinc power in THF/saturated aqueous NH4 Cl solution gave corresponding allenic and propargylic alcohols with high selectivity.
p. 969-978
Received: 14 March 2001; in revised form: 26 October 2001 / Accepted: 26 October 2001 / Published: 30 November 2001
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| Download PDF Full-text (51 KB) Abstract: The rearrangement of 4-methyl-3,5-diaryl-4H -1,2,4-triazoles to the corresponding 1-methyl-3,5-diaryl-1H -1,2,4-triazoles showed regioselectivity comparable to that observed for the alkylation of 3,5-diaryl-1H -1,2,4-triazoles. This lends support to a proposed mechanism for the rearrangement that involves consecutive nucleophilic displacements steps.
p. 979-987
Received: 10 May 2001; in revised form: 26 October 2001 / Accepted: 26 October 2001 / Published: 30 November 2001
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| Download PDF Full-text (49 KB) Abstract: Selective synthesis of linear and gemini quaternary ammonium surfactants was accomplished by reacting the corresponding alkyl alcohols with 2-chloro-N,N-dimethylethylamine under basic conditions. The amines were quaternized with methyl chloride or methyl iodide.
p. 988-995
Received: 4 May 2001; in revised form: 1 November 2001 / Accepted: 5 November 2001 / Published: 30 November 2001
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| Download PDF Full-text (49 KB) Abstract: The newly developed chiral ligands 1 and 4 show opposite enantioselectivity in the asymmetric reduction of prochiral ketones resulting in the production of either enantiomer depending on the metal complex with high enantiomeric excess.
p. 996-1000
Received: 30 July 2001; in revised form: 10 October 2001 / Accepted: 23 October 2001 / Published: 30 November 2001
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| Download PDF Full-text (25 KB) Abstract: Various epoxides are converted to their corresponding thiiranes in excellent yields with ammonium thiocyanate and thiourea under non-aqueous conditions in the presence of catalytic amounts of Bi(TFA)3 and Bi(OTf)3 .
p. 1001-1005
Received: 15 April 2001; in revised form: 29 October 2001 / Accepted: 30 October 2001 / Published: 30 November 2001
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| Download PDF Full-text (117 KB) Abstract: A convenient three-step preparation of the dinucleating ligand, 1,6-bis(2-furyl)-2,5-bis(2-hydroxy-3-formyl-5-methylbenzyl)-2,5-diazahexane (3) starting from 2,6-bis(hydroxymethyl)-4-methylphenol (4) is reported. Compound 4 was partially oxidized with preactivated manganese dioxide to form compound 5, which was converted to 2-hydroxy-3-chloromethyl-5-ethylbenzaldehyde (6) with conc.HCl/EtOH. Compound 6 in turn reacted with N,N’-bis (2-furyl)-1,2-diaminoethane (7) in the presence of K2 CO3 in ethanol to give the title compound 3. No protecting groups were required in the whole process and the conditions were mild.
p. 1006-1011
Received: 27 October 2001 / Accepted: 2 November 2001 / Published: 30 November 2001
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| Download PDF Full-text (29 KB) Abstract: Deprotection of various phenols from their respective methoxymethyl ethers using an heteropolyacid catalyst was studied. The catalyst was the Wells-Dawson heteropolyacid, used both in bulk or supported on silica. Yields were high to quantitative after less than one hour reaction time and the catalyst was easily recoverable and reusable.
p. 1012
Received: 2 December 2001 / Published: 31 December 2001
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p. 1013-1014
Received: 2 December 2001 / Published: 31 December 2001
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p. 1015-1016
Received: 2 December 2001 / Published: 31 December 2001
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p. 1017-1018
Received: 1 December 2001 / Published: 31 December 2001
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p. 1019-1020
Received: 1 December 2001 / Published: 31 December 2001
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p. 1021
Received: 1 December 2001 / Published: 31 December 2001
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p. 1022-1029
Received: 1 December 2001 / Published: 31 December 2001
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p. 1030-1033
Received: 1 December 2001 / Published: 31 December 2001
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p. 1034-1040
Received: 1 December 2001 / Published: 31 December 2001
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p. 1041-1043
Received: 1 December 2001 / Published: 31 December 2001
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p. 1044-1046
Received: 1 November 2001 / Published: 31 December 2001
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p. 1047-1054
Received: 1 December 2001 / Published: 31 December 2001
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p. 1055-1056
Received: 1 December 2001 / Published: 31 December 2001
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p. 1057-1058
Received: 1 December 2001 / Published: 31 December 2001
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p. 1059
Received: 1 December 2001 / Published: 31 December 2001
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p. 1060
Received: 1 December 2001 / Published: 31 December 2001
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p. 1061-1062
Received: 1 December 2001 / Published: 31 December 2001
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p. 1063
Received: 1 December 2001 / Published: 31 December 2001
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p. 1064-1065
Received: 1 December 2001 / Published: 31 December 2001
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p. 1066-1067
Received: 1 December 2001 / Published: 31 December 2001
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