Crystal Structures of (Z)-1-Phenyl-1-phenylseleno- 2-(p-tolylsulfonyl)ethene and (Z)-1,3-Diphenyl-3- phenyl-seleno-2-(p-tolylsulfonyl)-2-propen-1-ol

The molecular structures of compounds (Z)-1-phenyl-1-phenylseleno-2-(p-tolyl- sulfonyl) ethene 1 (C21H18O2SSe, Mr = 413.37) and 1,3-diphenyl-3-phenylseleno-2-(p-tolylsulfonyl) -2-propen-1-ol 2 (C28H24O3SSe, Mr = 519.49) were determined by single-crystal X-ray diffraction analyses. Crystal 1 crystallizes in monoclinic, space group P21/n with a = 12.574(4), b = 12.087(3), c = 13.132(4) , b = 107.973(4), V = 1898.5(9) ?, Z = 4, Dc = 1.446 g/cm3, m = 2.098 mm-1, l = 0.71073 ? F(000) = 840, R = 0.0484 and wR = 0.1085. Crystal 2 crystallizes in monoclinic, space group P21/n with a = 7.0710(4), b = 14.6604(9), c = 24.3432(5) ? b = 94.76(1), V = 2514.8(3) 3, Z = 4, Dc = 1.372 g/cm3, m = 1.603 mm-1, l = 0.71073 ? F (000) = 1064, R = 0.0366 and wR = 0.0573. The X-ray diffraction analysis shows that both of the title compounds are in Z- configuration.

Solid-phase Synthesis of-Haloaldehydes from Polymer-supported 4-(Phenylseleno)morpholine

Polystyrene-supported 4-(phenylseleno)morpholine was synthesized and could be used as an efficient ?selenenylating agent for saturated aldehydes. ?Haloaldehydes were prepared by reaction of polystyrene-supported ?selenoaldehydes with bromine or sulfuryl chloride in good yield and high purity.

Synthesis, Spectral Characterization and Ligation of <i>N</i>-[2-(Phenylseleno)ethyl]phthalimide

PhSe-Na+ generated in situ by reduction of PhSeSePh, with sodium borohydride on reaction with N-(2-bromoethyl) phthalimide in N2 atmosphere results in the formation of N-[2-(phenylseleno)ethyl]phthalimide (L1). The title compound has been characterized by elemental analysis, FT-IR, 1H and 13C NMR techniques. The crystal structure of L1 has been solved by direct methods and refined by full-matrix least squares. The ligand L1 crystallize in the monoclinic space group. Selenium forms two Se-C linkages, one is due to Se-Calkyl and the other one to Se-Caryl. Further, the ligation reaction of L1 with complex 1 is also explored whose identities are characterized by spectroscopic techniques.

Synthesis and Crystal Structure of N-(5-Phenylseleno)pentyl Succinimide

N-(5-phenylseleno)pentyl succinimide 1, C15H19NO2Se (Mr = 324.27), was prepared by treating Br(CH2)5SePh with potassium succinimide. Its crystal structure has been determined by X-ray single-crystal diffraction. The crystal of 1 belongs to monoclinic system, space group P21/c with the crystal cell parameters: a = 18.018(6), b = 5.980(2), c = 14.682(5) ? = 109.977(6)? V = 1486.7(9) 3, Z = 4, Dc = 1.449 g/cm3, (MoK? = 2.523 mm-1, F(000) = 664,the final R = 0.0302 and wR = 0.0666 for 2623 independent observed reflections with I > 2(I). Structure analyses revealed that there exist strong nonclassical hydrogen bonds (CH…O).

Highly Stereoselective Synthesis of Phenylseleno-and p-Tolylsulfonyl Substituted 1,3-Dienes from Functionalized Allyl Alcohols

Phenylseleno- and p-tolylsulfonyl substituted 1,3-dienes were conveniently prepared with high stereoselectivity by the elimination reaction of phenylseleno- and p-tolylsulfonyl substituted allyl alcohols in the presence of BF3·Et2O in acetic anhydride. The products were characterized by 1H NMR, MS, IR and elemental analysis. The single crystal structure of 2a was determined by X-ray diffraction analysis.

多取代芳香族化合物的合成 4.取代的环丁-3-烯砜与丁炔二酸二甲酯的Diels-Alder反应

３－苯硒基－或３－苯硫基取代的环丁－３－烯砜甚易与丁炔二酸二甲酯发生Ｄｉｅｌｓ－Ａｌｄｅｒ反应，生成相应的苯硒基或苯硫基取代的１，４－环己二烯－１，２－二羧酸二甲酯，此类产物用二氯二氰苯醌（ＤＤＱ）处理，即生成相应的多取代芳香族化合物４－苯硒基邻苯二甲酸二甲酯或４－苯硫基邻苯二甲酸二甲酯。

由聚合物负载的N-硒基吗啉试剂合成α-卤代醛

常温下,聚苯乙烯负载硒溴试剂和吗啉在二氯甲烷中反应得到新型的聚苯乙烯负载N-硒基吗啉试剂;聚苯乙烯负载N-硒基吗啉是含α-氢的醛有效的α-硒基化试剂,该负载型的α-硒基醛经卤代脱硒,以良好的产率(70%～92%)生成α-卤代醛,操作简便(过滤、洗涤),粗产物不需进一步提纯即具有好的纯度(>95%),N-硒基吗啉树脂可再生使用.两种新型的负载型N-硒基吗啉和α-硒基醛试剂无毒无味、使用方便,长时间保存其活性无明显下降.