126-99-8Relevant articles and documents
Strontium chloride modified Nieuwland catalyst in the dimerization of acetylene to monovinylacetylene
Lu, Jun-Long,Xie, Jian-Wei,Liu, Hai-Yue,Liu, Ping,Liu, Zhi-Yong,Dai, Bin
, p. 8211 - 8214 (2014)
SrCl2 was used as a co-catalyst of CuCl in Nieuwland catalyst and CuCl as the main catalyst, NH4Cl as the solubilizer, water as the solvent and a certain amount of hydrochloric acid, thereby forming Sr-Cu bimetallic cooperative catalysis reaction systems for C2H2 dimerization. Under the optimum condition, the acetylene conversion is 13 % and monovinylacetylene selectivity can reach to 94 %.
Thermal ring opening of 1,1-dibromo and 1-bromo-2- chloromethylcyclopropanes: Observation of a formal debromochlorination
Sydnes, Leiv K.,Alnes, Karl F. S.,Pettersen, Anita,Brinker, Udo H.
experimental part, p. 479 - 483 (2010/06/16)
When the title compounds are thermolyzed in the gas phase under vacuum or in hot quinoline, several products are formed. A predominant product in all cases is a chlorine-free buta-1,3-diene which has been formed by formal debromochlorination, a reaction n
Synthesis of the potent anticancer agents ottelione A and ottelione B in both racemic and natural optically pure forms
Clive, Derrick L. J.,Liu, Dazhan
, p. 3078 - 3087 (2008/09/19)
(Chemical Equation Presented) The powerful antitumor agents ottelione A and B were synthesized in racemic form by a method that relies on selective ring closing metathesis. Optically pure natural (+)-ottelione A was then made from D-ribose, via an α-keto cyclopropane. A key feature of the route is that the cyclopropyl group controls the stereochemistry in the attachment of the ArCH2 unit and is then converted by the action of SmI2 into a vinyl group, so that the substituents on the resulting five-membered ring have the required trans relationship. Epimerization of an intermediate gave access by the same method to the trans ring fused isomer (-)-ottelione B.