1-（1，4-苯并二噁烷-2-甲酰基）哌嗪的合成

1-(1,4-苯并二噁烷-2-甲酰基)哌嗪为甲磺酸多沙唑嗪的重要中间体,以邻苯二酚与环氧氯丙烷为原料,经环合、氧化、氯化、酰化、缩合四步反应合成了治疗高血压和前列腺增生药物甲磺酸多沙唑嗪的关键中间体1-(1,4-苯并二噁烷-2-甲酰基)哌嗪。原料廉价,易得,反应条件温和,操作方便。     

(Z)-7-苯亚甲基-5H-二苯并[b,g][1,4]氧氮杂环辛-6(7H)-酮的合成

以2-碘苯酚和2-氟硝基苯为原料,经Ullmann缩合、还原、Sonogashira偶联、羰基环化反应首次合成了(Z)-7-苯亚甲基-5 H-二苯并[b,g][1,4]氧氮杂环辛-6(7 H)-酮,总收率34.9%。产物结构经1 H NMR、13C NMR和MS表征。     

FORMATION OF MULLITE FROM CYANITE,ANDALUSITE, AND SILLIMANITE1

This paper deals with a thermal and microscopic study of thc decomposition of cyanite, andalusite, and sillirnanite to mullite and silica, or to mullite and a siliceous liquid. The rates of alteration, the signs or the heat effects accompanying the changes, and the way in which the decompositions take place have been investigated. The bearing on refractories is discussed.     

1-甲基-3-(7-氟-4-炔丙基-1,4-苯并噁嗪-3-酮-6-基)-1,3-喹唑啉-2,4-二酮的合成及其除草活性

标题化合物(SYP-298)是沈阳化工研究院的试验除草剂,由邻硝基苯甲酸经5步反应制得。其结构经核磁共振谱和质谱分析确证。SYP-298在温室条件下38 g a.i./hm2可防多种阔叶杂草,在600 g a.i./hm2对玉米和水稻安全。     

4－［2－（9，10－二氰基蒽）乙烯基］－N，N－二甲基苯胺的三荧光发射

４－［２－（９，１０－二氰基蒽）乙烯基］－Ｎ，Ｎ－二甲基苯胺的三荧光发射王华，陈景荣，张宝文，曹怡（中国科学院感光化学研究所光化学开放实验室，北京１００１０１）关键词分子内电荷转移，荧光发射从分子水平进行电子转移，电荷分离的研究是十分重要的，它不仅是...     

Crystal structure of tetrabutylammonium [bis(1,3-dithiole-2-thione-4,5-dithiolato)bismuthate(1-)], [NBu4][Bi(dmit)2]

The crystal structure of ionic [NBu₄][Bi(dmit)₂] (5: Q=NBu₄), obtained from BiBr₃ and [NBu₄]₂[Zn(dmit)₂], has been determined. The bismuth atoms are six coordinate, as a consequence of two inter-anion Bi–S contacts with two neighbouring anions. In addition to the four intra-anion Bi—S bonds to the two thiolato S atoms of the dmit ligands [Bi–S between 2.5872(14) and 2.8082(13) Å: the inter-anion bonds involve thione S atoms [Bi—S(10)ⁱ=3.2548(11) and Bi–S(10)ⁱⁱ 3.4628(13) Å]. Excluding consideration of any lone pair effect, the Bi atoms have very distorted octahedral geometries. The anions form centrosymmetric pairs of chains with the shortest Bi–Bi distance of 4.180 Å being between the pairs of chains; overlapping parallel dmit ligands, within the pairs of chains, are separated by a perpendicular distance of 3.477(2) Å, with the dmit centroid–dmit centroid separation of 3.529 Å, ideal for π–π interaction.