5588-52-3Relevant articles and documents
Enantioselective approach to securinega alkaloids. Total synthesis of securinine and (-)-norsecurinine
Gonzalez-Galvez, David,Garcia-Garcia, Elena,Alibes, Ramon,Bayon, Pau,De March, Pedro,Figueredo, Marta,Font, Josep
experimental part, p. 6199 - 6211 (2010/01/06)
(Chemical Equation Presented) The most representative securinega alkaloids have been synthesized through a new strategy involving the palladium-catalyzed enantioselective allylation of a cyclic imide, a vinylogous Mannich reaction, and a ring-closing meta
First Diastereoselective Chiral Synthesis of (-)-Securinine
Honda, Toshio,Namiki, Hidenori,Kaneda, Kyosuke,Mizutani, Hirotake
, p. 87 - 89 (2007/10/03)
(Equation presented) A diastereoselective total synthesis of securinine in optically pure form was achieved by employing ring-closing metathesis of the corresponding dienyne compound as a key step.
Kinetics and mechanism of the alkaline hydrolysis of securinine
Lajis,Noor,Khan
, p. 126 - 130 (2007/10/02)
The hydroxide ion-catalyzed hydrolysis of securinine involves the ring opening of the lactone moiety. The rate of hydrolysis is insensitive to the ionic strength. The observed pseudo-first-order rate constants reveal a decrease of approximately 4-fold due to the increase in the MeCN content from 4 to 50% (v/v) in mixed aqueous solvent. The temperature dependence of the rate of hydrolysis follows the Eyring equation, which yields ΔH* and ΔS* as 11.0 kcal mol-1 and -34.5 cal deg-1 mol-1, respectively. The hydroxy carboxylate product of the alkaline hydrolysis of securinine is shown to undergo cyclization in acidic medium to yield securinine. The observed pseudo-first-order rate constants for cyclization increase linearly with an increase in [H+]. The change in the content of MeCN from 3.8 to 47.2% (v/v) in mixed aqueous solvents does not show an effect on the rate of the cyclization reaction. The most plausible mechanisms for alkaline hydrolysis and acid cyclization reactions are also discussed.