95979-33-2Relevant academic research and scientific papers
New musk odorants: (3E)-4-(2′-alkyl-5′,5′- dimethylcyclopent-1′-enyl)but-3-en-2-ones and (3E)-1-acetyl-3-alkylidene- 4,4-dimethylcyclohexenes
Kraft, Philip,Popaj, Kasim
experimental part, p. 4806 - 4814 (2009/05/11)
Four new representatives, 18, 23, 29, and 32, of the young family of dienone musks were synthesized by two general routes. The first five-step synthetic route leading to (3E)-4-(2′-alkyl-5′,5′- dimethylcyclopent-1′-enyl)but-3-en-2-ones commenced with the
Untersuchungen im Wittig-System nach einem ordnenden Konzept auf der Basis alternativer Prinzipien
Bandmann, Heinz,Bartik, Tamas,Bauckloh, Sylvia,Behler, Ansgar,Brille, Frank,et al.
, p. 193 - 204 (2007/10/02)
Our results show that the stereoselectivity of the Wittig-reaction can be controlled by the variation of substituents in accord with the ORDERING CONCEPT OF ALTERNATIV PRINCIPLES (individual pairs, known and unknown classes of alternatives).The "all-phenyl Wittig-system" having three phenyl groups on phosphorous two in ylid- and aldehyd-position was chosen as a standard for our investigations.Differentiation in ylid-position and compensation on phosphorous and aldehyd-position were observed by the comparison of "patterns".Consequently, most of the selectivity rules of Wittig-reactions can be explained by the differentiation through alternatives in the ylid-position.Inversion or conservation of the "patterns" of measured data points to the variation in structure of starting materials, reaction rates and selectivities.Amount-controls were also described in certain systems.
