133775-37-8Relevant academic research and scientific papers
Asymmetric Catalysis by Vitamin B12: The Isomerization of Achiral Cyclopropanes to Optically Active Olefins
Troxler, Thomas,Scheffold, Rolf
, p. 1193 - 1202 (1994)
Achiral spiroactivated cyclopropanes are isomerized to optically active (R)-(cycloalk-2-enyl)-Meldrum's acids (= (R)-5-(cycloalk-2-enyl)-2,2-dimethyl-1,3-dioxane-4,6-diones) in high yield and ee's up to 86percent by catalytic amounts of cob(I)alamin in po
A highly stereoselective divergent synthesis of bicyclic models of photoreactive sesquiterpene lactones
Fuchs, Sebastien,Berl, Valerie,Lepoittevin, Jean-Pierre
, p. 1145 - 1152 (2008/02/06)
Sesquiterpene lactones are natural stereochemically pure compounds, which show a number of biological activities. In order to study the reactivity of sesquiterpene lactones in biological systems, we describe herein the asymmetric synthesis of a simple mod
Investigation of the Chemo- and Stereoselectivity of the Ketene-Claisen Rearrangement
Ernst, Beat,Gonda, Jozef,Jeschke, Rainer,Nubbemeyer, Udo,Oehrlein, Reinhold,Bellus, Daniel
, p. 876 - 891 (2007/10/03)
A novel type of ketene-Claisen rearrangement in which the precursor of the rearrangement is generated in situ by reaction of optically active allyl thioethers with dichloroketene is described. A characteristic feature of this rearrangement is the excellen
Synthesis of an enantiomerically pure aminoisoquinocarbazole with antiarrhythmic activity via lipase-catalyzed enantioselective transesterification
Fukazawa, Tetuya,Shimoji, Yasuo,Hashimoto, Toshihiko
, p. 1649 - 1658 (2007/10/03)
Enantiomerically pure (R)-2-cyclohexen-1-ol 5 was prepared via lipase- catalyzed enantioselective transesterification of 2-substituted cyclohexanol, and stereospecifically converted to (-)-(2-cyclohexenyl)acetic acid 4. Enantiomerically pure aminoisoquinocarbazole 1 (RS-2135) was synthesized stereoselectively from 4, using an intramolecular Diels-Alder reaction and Curtius rearrangement.
A simple preparation of (R)-(2-cyclopentenyl)acetic acid and (R)-(2-cyclohexenyl)acetic acid using β-diastereoselective radical cyclization in the presence of Lewis acid
Nishida,Hayashi,Yamaura,Yanaginuma,Yonemitsu,Nishida,Kawahara
, p. 269 - 272 (2007/10/02)
The alkenyl radical generated from (-)-8-phenylmenthyl 7-iodo-2,6-heptadienoate smoothly cyclized to afford (R)-(2-cyclopentenyl)acetate with 88% de in 90% yield. (R)-(2-Cyclohexenyl)acetate was also obtained with 84% de in 72% yield under the same conditions. The presence of Lewis acid is essential for high diastereoselectivity and chemical yield.
Indolobenzoquinoline derivatives, their preparation and their use as anti-arrhythmic drugs
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, (2008/06/13)
Optically active compounds of formula (I): in which R1 is hydrogen or alkyl; Xband Ybare hydrogen or hydroxy; and Z is -NRaRb, in which Raand Rbare hydrogen, alkyl or hydroxyalkyl,or a cyclic amino group;, and pharmaceutically acceptable salts thereof have enhanced anti-arrhythmic activity and may be prepared by a stereospecific synthesis process.
