Download Chemistry of Heterocyclic Compounds: Thiophene and Its by Salo Gronowitz PDF

By Salo Gronowitz

Vinylthiophenes and Thienylacetylenes (S. Gronowitz & A.-B.

Hornfeldt).

Organometallic Derivatives of Thiophenes (T. Frejd).

Syntheses, Reactions, and actual homes of Bithienyls and Polythienyls and heavily comparable Compounds (R. H?kansson).

Index.Content:
Chapter I Vinylthiophenes and Thienylacetylenes (pages 1–256): Salo Gronowitz and Anna?Britta Hornfeldt
Chapter II Organometallic Derivatives of Thiophenes (pages 257–754): Torbjorn Frejd
Chapter III Syntheses, Reactions, and actual houses of Bithienyls and Polythienyls and heavily comparable Compounds (pages 755–905): Rolf Hakansson

Show description

Read Online or Download Chemistry of Heterocyclic Compounds: Thiophene and Its Derivatives, Part Five, Volume 44 PDF

Similar organic books

The Biogeochemistry of Submerged Soils

Submerged soils and the wetlands they aid are of massive sensible significance: in international aspect cycles, as centres of biodiversity, in international meals creation. also they are uniquely fascinating scientifically as a result of their odd biogeochemistry and the diversifications of vegetation and microbes to it.

Metal-Catalyzed Cross-Coupling Reactions

During this moment, thoroughly revised and enlarged version, Francois Diederich is joined through Armin de Meijere in bringing jointly in finished volumes every little thing of value on the topic of C-C and C-N cross-coupling reactions. the variety of functions coated extends from the synthesis of advanced common fabrics through supramolecular chemistry correct as much as fabrics technology.

Organic Chemistry: An Intermediate Text, Second Edition

Excellent if you happen to have formerly reports natural chemistry yet no longer in nice intensity and with little publicity to natural chemistry in a proper feel. this article goals to bridge the distance among introductory-level guide and extra complex graduate-level texts, reviewing the fundamentals in addition to proposing the extra complex principles which are at present of value in natural chemistry.

Additional resources for Chemistry of Heterocyclic Compounds: Thiophene and Its Derivatives, Part Five, Volume 44

Example text

280 In the condensation with formaldehyde, 2-methyl-3-nitrothiophene reacted differently and gave trans- 1,2bis-(3-nitro-2-thienyl)cyclobutaneas the main product,280together with 3-nitro2-vinylthiophene. 280 9. Wittig Reaction A. 282 2 9 1 The starting triphenylphosphonium halides were easily obtained by the reaction of thenyl halides with triphenyl phosphine. The thenyl halides were 11. Preparation of Vinylthiophenes 35 prepared by chloromethylation of thiophenes or side-chain bromination of methylthiophenes.

The yields in the R = 3-Th R: 2-Th R = 2-FU R = -CH=CHPh R=C,H, R = 3-Th R = 2-Th R = 5-CI-2-Th R =-CHXHPh 148 147 R=H R=OCH, R=CI 149 34 Vinylthiophenes and Thienylacetylenes condensation with cinnamaldehyde were very low. Dinitrodistyrylthiophenes 149 were prepared in an 8 6 8 5 % yield from 2,5-dimethyl-3,4-dinitrothiophene and the appropriate aldehyde, normally using no solvent and pyrrolidine as a catalyst. The methyl group in the o-methylnitrothiophenes shows varying reactivity toward aldehydes under base catalysis.

244 100 99 The condensation of 2- and 3-thiophene aldehyde with 101, a malonaldehyde equivalent, gave 102 in a 86% and a 75% yield, respectively, using acetic anhydride and zinc chloride for the c ~ n d e n s a t i o n . 247 + (CH3)zNCH=CH-CH=N(CH3)zC10~ 101 102 y)0 II ' W C H 0 + HzC,C II 0 103 104 105 26 Vinylthiophenes and Thienylacetylenes X=H, 107 106 6. 248-2s3These products have been used for the preparation of benzo[b]thiophene derivatives. This cyclization was also utilized as a proof of the stereochemistry of the acid 108.

Download PDF sample

Rated 4.58 of 5 – based on 37 votes

About the Author

admin