Addition of HCl accelerated the photocyclodimerization of trans-4-styrylpyridine 1a in methanol and increased the yield of syn-head-to-tail (syn-HT) dimer 2a through the effect of cation-π interactions between the pyridinium ion of one molecule and the phenyl group of the other. We examined the photoirradiation products of derivatives of 1a having alkyl substituents on the phenyl group (1b-1f)....

Abstract In the present study solution and coordination chemistry of copper(II)–alkyl- N -iminodiacetate systems are studied in aqueous by potentiometry, using ion selective copper pH electrodes, EXAFS (extended X-ray absorption fine structure) dye probe molecular spectrophotometry. Alkyl- -iminodiacetates with varying alkyl chain length, methyl (CH 3 –), n -hexyl (C 6 H 13 -dodecyl 12 25 –) -o...

Varying the size of an alkyl side-chain group, installed by thiol–ene addition alkylthiols to poly(?-allyl caprolactone), semi-crystallinity and lipophilicity functional PCLs could be modulated achieve divergent physico-chemical properties.

A new phenylethyl alkyl amide, (10R)-10-hydroxy-N-phenethyloctadecanamide (1), was isolated from the beetle Ambrostoma quadriimpressum Motschulsky. The structure of the amide was determined by NMR and MS. The absolute configuration of compound 1 was confirmed by an asymmetric total synthesis, which was started from L-glutamic acid. The construction of the aliphatic chain was accomplished by the...

N-Acyloxy-N-alkoxyamides are direct-acting mutagens in S. typhimurium TA100 with a linear dependence upon log P that maximises at log P0 = 6.4. Eight N-acyloxy-N-alkoxyamides (2-9) bearing a naphthalene group on any of the three side-chains and with log P0 < 6.4 have been demonstrated to be significantly and uniformly more mutagenic towards S. typhimurium TA100 than 50 mutagens without naphthal...

A general approach to asymmetric synthesis of highly substituted spirodihydrocoumarins with a quaternary stereocenter was achieved through neighboring ortho-hydroxyl group induced sequential Michael-lactonization reactions on 2-(2-nitrovinyl)phenols with alkyl cyclopentanone-2-carboxylates in the presence of a catalytic amount of quinine-NH-thiourea followed by p-TSA.

a simple, mild and practical procedure has been developed for the synthesis of symmetrical and unsymmetrical ethers by using dmso, tbai in the presence of k2co3. we extended the utility of  potassium carbonate as an efficient base for the preparation of ethers. a wide range of alkyl aryl and dialkyl ethers are synthesized from treatment of aliphatic alcohols and phenols with various alkyl halid...

Theoretical models have been used to derive rate coefficients for the unimolecular reaction pathways of two prototypical alkoxyl radicals (1-butoxyl and 2-pentoxyl) which can undergo 1,5 H-shift isomerisation yielding the corresponding delta-hydroxy alkyl radical. Special emphasis has been given to the contribution of tunnelling in the isomerisation channels which has not been accounted for in ...

The synthesis and characterisation of a rare U(iii) alkyl complex, U[η4-Me2NC(H)C6H5]3, using the dimethylbenzylamine (DMBA) ligand has been accomplished. While attempting to prepare the U(iv) compound, reduction to the U(iii) complex occurred. In the analogous Th(iv) system, C-H bond activation of a methyl group of one dimethylamine was observed yielding Th[η4-Me2NC(H)C6H5]2[η5-(CH2)MeNC(H)C6H...