THE SYNTHESES OF 1,1,1-TRIFLUORO-2-SUBSTITUTED-PHENYL-2-PROPYL-3-^(14)C P- TOLUENESULFONATES

1,1,1,-Trifluoro-2- substituted- phenyl- 2- propanols- 3- 14C were prepared from addition of methyl- 14C magnesium iodide to appropriate trifluoroacetophenone. These alcohols were converted into tosylatcs by reaction with n-butyllithium and then with p-toluenesulfonyl chloride. The yield, boiling point or melting point and pertinent spectral data of these compounds are reported.

Synthesis and Crystal Structure of 1,2-Dis(1,3-diphenylpropan-2-yl)disulfane

A novel compound of 1,2-dis（1,3-diphenylpropan-2-yl）disulfane（C30H30S2,Mr=454.27）was synthesized in ethanol with 1,3-diphenyl-2-propanone as raw materials,giving high yield of product（90%）.Its structure was determined by IR,1H NMR,MS,elemental analysis and X-ray diffraction.The crystal belongs to monoclinic,space group C2 with a=18.727（3）,b=6.5179（9）,c=13.7576（18）,β=131.0610（10）o,V=1266.2（3）3,Z=2,Dc=2.136 g/cm3,μ=1.078 mm-1,F（000）=843,R=0.0490 and wR=0.1247 for 3211 observed reflections with I2（I）.X-ray analysis reveals that the molecule is not symmetrical.There exist no classical hydrogen bonds andπ-πstacking interactions.Moreover,the thermal stability of compound 3 was investigated.

Synthesis and Nonlinear Optical Properties of New Quadrupolar Chromophores

Two new symmetric chromophores: 2, 8-bis-[(2-4′-ethoxy phenyl-5-4′-styryl)-1, 3, 4- oxadiazole] didibenzothiophene (abbreviated as SO-G1) and 2, 8-bis-[(2-4′-ethoxy phenyl-5-4′- styryl)-1, 3, 4-oxadiazole]-N-ethyl carbazole (abbreviated as NO-G1) have been synthesized and characterized. Both chromophores exhibit strong two-photon absorption (TPA) with the cross-sections of 2.99×10-48 and 3.48×10-48 cm4?s?photon-1 in THF and large up-conversion emission, when pumped by Ti:sapphire femto-second laser at 720 nm.

An environmentally friendly synthesis of 1,4-dihydropyrano[2,3-c]pyrazole derivatives catalyzed by tungstate sulfuric acid

An efficient three-component synthesis of 6-amino-4-aryl-5-cyano-3-metriyl-1-phenyl-1,4-dihydropyrano[2,3-c]pyrazoles via a reaction between 3-methyl-1-phenyl-2-pyrazolin-5-one,aromatic aldehydes and malononitrile using tungstate sulfuric acid as a catalyst was described.Mild conditions,good to excellent yields,easily available catalyst and easy work-up are the key features of this method.

Synthesis of 3,3,5,5-tetrabenzyl-1,2,4-trithiol and 1,2-dis(1,3-arylpropan-2-yl)disulfane

Novel sulfur-containing compounds （3a-3c, 4a-4c） were obtained in ethanol with 1,3-diphenyl-2- propanone as the starting material. The advantages of this procedure were mild reaction conditions, simple protocol, and high yields. The structures of the products were characterized by IR, 1H NMR, MS and elementary analysis. The crystal of the new compound 4a belongs to monoclinic, space group C2 with a=18.727（3）, b=6.5179（9）, c=13.7576（18） A, fl=131.0610（10）°, V=I266.2（3）A3, Z=2, Dc=2.136g/cm3, μ=1.078mm 1, F（000）=843, R=0.0490 and wR=0.1247 for 3211 observed reflection with I 〉 2σ（I）. X-ray analysis reveals that the molecule is not symmetrical, the molecular structure is stabilized by weak π-π stacking interactions, and no classical hydrogen bonds can be observed.

A new phenolic compound from Crinum asiaticum L.

A new phenolic compound was isolated from the ethanol extract of the bulbs of Crinum asiaticum L.var.sinicum Baker.Its structure was defined as 1-（2-hydroxy-4-hydroxymethyl）phenyl-6-O-caffeoyl-β-D-gluco-pyranoside on the basis of spectroscopic evidences.