## Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Synthesis and Use of New Substituted 1,3,5-Hexatrienes in Studying Thermally Induced 6π-Electrocyclizations
✍ Scribed by Hans Wolf Sünnemann; Martin G. Banwell; Armin de Meijere
- Publisher
- John Wiley and Sons
- Year
- 2007
- Tongue
- English
- Weight
- 300 KB
- Volume
- 2007
- Category
- Article
- ISSN
- 1434-193X
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Palladium-catalyzed crosscoupling reactions of 2-bromocyclohex-1-enyl triflates 7 and 11 with a variety of alkenylstannanes occurred chemoselectively at the site of the triflate leaving group to give bromobutadienes which readily underwent Heck reactions with acrylates and styrene. Both steps could
## Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable v
1,6-Disubstituted (E,Z,E)-1,3,5-hexatrienes (4 and 5) were hex-1-ene (19) or by Wittig-Horner-Emmons olefination of 2bromocyclohexene-1-carbaldehyde ( 24) and subsequent prepared by vicinal twofold Heck coupling reactions from 1,2-dibromocyclopentene (1), 1,2-dibromocyclohexene (2), Heck reaction of
## Abstract 1‐Substituted‐3‐dimethylaminopropenones **1a‐d** reacted with acetylacetone and with ethyl acetoacetate to yield regioselectively 2,3,6‐trisubstituted pyridines. Refluxing **1a‐d** in acetic acid/ammonium acetate resulted in the formation of 6‐substituted‐3‐aroylpyridines, whereas reflu