Synthesis of 1, 5- and 1, 7-dichloro-9H-thioxanthen-9-ones

1, 5-Dichloro-9H-thioxanthen-9-one ( 2 ) was prepared by cyclization of 2-chloro-6-[(2-chlorophenyl)thio]-benzoic acid ( 10 ) obtained from 2-chloro-6-iodobenzoic acid ( 9 ) and 2-chlorobenzenethiol. Similarly, 1, 7-di-chloro-9H-thioxanthen-9-one ( 6 ) was prepared from 9 via 2-chloro-6-[(4-chlorophenyl)thio]benzoic acid ( 11 ). Compound 6 was also obtained by condensation of 2-chloro-6-mercaptobenzoic acid ( 12 ) with chlorobenzene in the presence of sulfuric acid.     

STUDY ON POLYMERIZATION MECHANISM OF 3, 9,-DIALLYL-3, 9, -DIBENZYL-1, 5, 7, 11-TETRAOXASPIRO [5, 5] UNDECANE

A new monomer, 3,9-diallyl-3, 9-dibenzyl-1, 5,7,11 - tetraoxa- spiro [5,5] undecane (6) was prepared by the reaction of 2- allyl- 2' - benzyl- propanediol - 1.3 with dibutyltin oxide, and then treated with CS_2. Monomer 4 could be initiated by cationic initiators to give a viscous polymer (white powder in the case of polymerization at 0℃). Upon the NMR and IR spectra of the obtained polymer, the components and their relative amount were estimated. The polymerization mechanism was discussed.     

Electride characteristics of M2(η5-E5)2 (M = Be,Mg; E = Sb5-)

Structural Chemistry - Ab initio computation is performed on the binuclear sandwich complexes, M2(η5-Sb5)2. Eclipsed and staggered conformations are generated due to the η5 mode of...     

Derivate des 5, 9-Methano-6, 7,8, 9-tetrahydro-5 H-benzocycloheptens und Umlagerungen zum 1, 4-Äthano-1,2,3,4-tetrahydronaphtalin-System

Derivatives of 5,9-Methano,7,8,9-tetrahydro-5H-benzocycloheptene and Rearrangements to the 1,4-Ethano-I,2,3,4-tetrahydronaphthalene System Reduction of the oxime 2 with Raney alloy gives the amine 3a , with AlH₃ a mixture of the isomeric amines 3a and 3b , whilst LiAlH₄ yields the aziridines 4a and 4b . The bicyclo[3.2.1]octane 4b rearranges under acidic conditions to the bicyclo[2.2.2]octane 5 . The olefin 7 can be converted to the aminoalcohol 9 via the epoxide 8 and to the amine 13 using iodine isocyanate: the carbon skeleto. remains intact. However, treatment of the olefin 17 with iodine isocyanate leads to the bicyclo[2.2.2]octanes 21 and 24 in which a skeletal rearrangement has taken place. The configuration was determined by NMR. and X-ray analysis.     

5-丁基-9-苯基-4, 5, 6, 9-四氢苯并[d, e]恶唑[5, 4-g]-异喹啉-4, 6-二酮的合成

本文给出了一条较好的制备5-丁基-9-苯基-4, 5, 6, 9-四氢苯并[d, e]恶唑[5, 4-g]-异喹啉-4, 6-二酮的反应路线, 即: 先由4-溴-1, 8-萘酐经亚胺化、硝化、水解和还原等反应制得N-丁基-3-硝基-4-羟基-1, 8萘酰亚胺, 再在硼酸的存在下, 将亚胺与苯甲酰氯反应可得到目标化合物。文中给出了该化合物的质谱、核磁共振、红外、紫外和荧光等光谱数据。     

Fluorénacènes et fluorénaphènes Synthèses dans la série des indéno-fluorènes,XVI. Méthyl-5-, diméthyl-5, 6- et diphényl-5, 6-dihydro-11, 12-indéno [2.1-a] fluorène

Starting from 2-methyl- and from 2,3-dimethyl-1,4-diphenyl-butadiene-1, 3 respectively, the 5-methyl- and the 5,6-dimethyl-11, 12-dihydro-indeno[2.1-a]fluorene are synthesized in 4 steps. The 5, 6-diphenyl-11, 12-dihydro-indeno[2.1-a]fluorene is obtained by reduction of the already known 11, 12-dioxoderivative. Accesorily a new preparation of the unsubstituted hydrocarbon is described.     

Editorial board page for “Synthetic Communications”, Volume 9, Number 5

This is a scanned image of the original Editorial Board page(s) for this issue.     

Editorial board page for “Liquid Crystals”, Volume 9, Number 5

Abstract

This is a scanned image of the original Editorial Board page(s) for this issue.