33501-88-1Relevant academic research and scientific papers
Monoterpenoid Synthesis by Transition Metal Catalyzed Coupling of Enediylmagnesium with C5-Organic Halides
Kajihara, Yasushi,Ishikawa, Katsuhiro,Yasuda, Hajime,Nakamura, Akira
, p. 3035 - 3036 (1980)
A series of isoprene coupling dimers bonded at 1-2, 1-3, 1-4, 2-4, 3-4, or 4-4 position was prepared by regiocontrolled catalysis of transition metals or without catalysts in the reaction of 2-methyl-2-butene-1,4-diylmagnesium or 3-methyl-2-butenylmagnesium chloride with C5-alkenyl halides.
ION-CATALYZED TELOMERIZATION. STERIC EFFECT OF ALKYL SUBSTITUENTS
Muks, E. A.,Erm, A. Yu.,Lyiveke, I. A.,Teng, S. E.,Krumm, L. L.,Leets, K. V.
, p. 1658 - 1661 (2007/10/02)
The cationic telomerization of tri- and tetramethylethylenes with allyl chlorides was studied.It was found that the reaction of tetramethylethylene with secondary and tertiary chlorides leads mainly to the formation of the side products on account of steric hindrances.During the cotelomerization of the initial telogens and taxogens their relative reactivities and the steric constants for the addition of the secondary chlorides to tetramethylethylene (s = 0.47) were determined.It was shown that during the formation of products with several tri- and tetrasubstituted carbon atoms the steric hindrances during the reaction of the reagents increase, and this leads to a decrease in the addition rate and to an increase in the amount of products from the side reactions.
